# Solved papers for AMU Medical AMU Solved Paper-1995

### done AMU Solved Paper-1995

• question_answer1) A body falls from rest under gravity. Its speed is v when it has lost an amount U of its potential energy. The mass of the body is

A) $\frac{Ug}{{{v}^{2}}}$

B) $\frac{{{v}^{2}}}{2g}$

C) $\frac{U}{g}$

D) $\frac{2U}{{{v}^{2}}}$

• question_answer2) Two blocks of masses${{m}_{1}}$and${{m}_{2}}$are lying on a horizontal frictionless table connected by a weightless string as shown in the diagram. The blocks are pulled by a horizontal force F applied to ${{m}_{1}}$ The common acceleration of the blocks is

A) $F/({{m}_{1}}+{{m}_{2}})$

B) $F/{{m}_{1}}$

C) $F/{{m}_{2}}$

D) $(F+T)/{{m}_{2}}$

• question_answer3) If the net external force on a system of masses is zero. Which of the following is/are always conserved?

A) total kinetic energy

B) total linear momentum

C) total angular momentum

D) total kinetic energy as well as linear momentum

• question_answer4) A body is moving under the action of two forces${{\overrightarrow{F}}_{1}}=2\hat{i}-5\hat{j};{{\overrightarrow{F}}_{2}}=3\hat{i}-4\hat{j}$ Its velocity will become uniform under a third force${{\overrightarrow{F}}_{3}}$given by

A) $5\hat{i}-\hat{j}$

B) $-5\hat{i}-\hat{j}$

C) $5\hat{i}+\hat{j}$

D) $-5\hat{i}+9\hat{j}$

• question_answer5) A cannon at the ground fires a shell at speed of 50 km/hr. If the angle of projection is$30{}^\circ ,$ the range of the shell (take$g=10\text{ }m/{{s}^{2}}$) is, in km.

A) $2.5\sqrt{{}}3$

B) $62.5\sqrt{{}}3$

C) $125\sqrt{{}}3$

D) $9.65\sqrt{{}}3\times {{10}^{-3}}$

• question_answer6) A body starts moving with a velocity of 6 m/s making an angle of$30{}^\circ$with the x-axis. It has a uniform acceleration of$3\text{ }m/{{s}^{2}}$in the direction of$x-$axis. After 5 seconds, the ^-component of its velocity will be, in m/s.

A) $3\sqrt{{}}3$

B) 15

C) 18

D) 21

• question_answer7) Two vectors $\overrightarrow{A}=4\hat{i}+5\hat{j}+r\hat{k}$ and$\overrightarrow{B}=2\hat{i}-4\hat{j}+6\hat{k}$ are perpendicular to each other if the scalar r is

A) 4

B) 2

C) 0

D) $-2$

• question_answer8) A car is moving due north accelerated in the same direction, while a train is moving parallel to it also due north with a uniform speed of 100 km/hr. At the time when the speed of the car is 80 km/hr, an observer in the train finds the car speeding

A) due south at 20 km per hour, accelerated due north

B) due north at 20 km per hour, accelerated due south

C) due south at 180 km per hour, accelerated due north

D) due north at 180 km per hour, accelerated due south

• question_answer9) An$\alpha -$particle enters a straight hollow tube 1 m long with initial speed of$1.0\times {{10}^{3}}$ m/s. After travelling horizontally with uniform acceleration. It leaves the tube with the speed of$3.0\times {{10}^{3}}m/s$. The time spent by the particle inside the tube is, in microseconds.

A) 1000

B) 500

C) 250

D) 50

• question_answer10) The dimensional formula for latent heat (in energy units) is

A) $M{{L}^{2}}{{T}^{-1}}$

B) $ML{{T}^{-2}}$

C) ${{M}^{0}}{{L}^{2}}{{T}^{-2}}$

D) $M{{L}^{2}}{{T}^{-2}}$

• question_answer11) Average kinetic energy of an ideal gas consisting of N molecules is 3/2 NkT, where k is

A) gas constant

B) Stefan constant

C) Boltzmann constant

D) Planck constant

• question_answer12) Youngs modulus for the material of a wire depends On

A) stretching force

B) length of the wire

C) cross-section area

D) none of the above

• question_answer13) When a body floats in water${{\left( \frac{1}{3} \right)}^{rd}}$of its volume remains outside, whereas${{\left( \frac{3}{4} \right)}^{th}}$of its volume remains outside when it floats in a liquid. The density of the liquid, in gm/cc, is

A) 8/3

B) 4/3

C) 9/4

D) 3/2

• question_answer14) A liquid drop of radius R breaks into 27 small drops. What will be the change in surface energy if the surface tension of the liquid is$T$?

A) $8\pi {{R}^{2}}T$

B) $12\pi {{R}^{2}}T$

C) $8{{\pi }^{2}}{{R}^{2}}T$

D) $12{{\pi }^{2}}{{R}^{2}}T$

• question_answer15) A stone is dropped from the top of a tower of height H. At the same time a second stone is projected vertically with a velocity$\sqrt{3gH}$from the foot of the tower. At what height, from the foot of the tower, will the two meet?

A) $3H/4$

B) $5H/6$

C) $3H/8$

D) $H/2$

• question_answer16) A body of mass m is projected to describe a parabolic path in vertical plane with velocity $(3\hat{i}+8\hat{j})$m/s. The time of flight of the body is about

A) 3.2 sec

B) 1.6 sec

C) 6.4 sec

D) 1.2 sec

• question_answer17) Which of the following statements is correct?

A) torque does not change the angular momentum

B) in a rotational motion, force along a radial vector changes the angular momentum

C) angular velocity, angular momentum and torque are axial vectors

D) angular momentum and torque are always perpendicular to each other

• question_answer18) Three identical spheres of radius r and mass m touch each other (as shown). If the centre of mass of one of them is (0,0) then the centre of mass of the system is

A) $r,r/2$

B) $r,r/3$

C) $\frac{\sqrt{{}}3}{2}r,r$

D) $r,r\sqrt{{}}3$

• question_answer19) Work done by a force of 2 N acting along the $x-$axis on a body that moves from a point (3, 4) to another point (6, 8), distances being in metres, is

A) 6 J

B) 8 J

C) 10 J

D) 16 J

• question_answer20) A body of mass 100 g stops after travelling a certain distance on a rough horizontal surface. If its initial speed was 200 cm/s, the work done by it against the force of friction is

A) $-0.2\text{ }J$

B) $+0.2\text{ }J$

C) cannot be calculated because the coefficient of friction is not given

D) cannot be calculated because the distance moved is not given

• question_answer21) Two concentric spherical shells, made of copper, have radii r and$R(R>r)$and carry changes q and Q respectively. The potential at the surface of the inner spherical shell will be zero if Q is equal to

A) $-\frac{(r+R)}{r}q$

B) $\frac{(r-R)}{r}q$

C) $-\frac{R}{r}q$

D) $\frac{r}{R}q$

• question_answer22) An electric dipole of moment p is placed in a uniform electric field E. The couple required to rotate it through an angle 9 from the initial position is

A) $pE\tan \theta$

B) $pE\cos \theta$

C) $-pE\cos \theta$

D) $pE\sin \theta$

• question_answer23) The equation of a wave travelling on a string is $y=5\cos \pi (0.5x-200t)cm$ Which is the wrong statement for the given wave?

A) the velocity of the wave is 4 m/s

B) the two consecutive points on the wave having equal and opposite displacement are separated by a distance 2 cm.

C) the phase difference between two points separated by a distance of 0.42 m is$\pi /2$

D) the displacement of the point distant 200 cm from the source will be zero at $t=\frac{201}{400}$sec.

• question_answer24) In a tank full of water, waves travel a distance of 45 cm in 3 s. If the distance between two consecutive crests is 3 cm, the frequency of the vibrator causing the waves, measured in Hz is

A) 5

B) 7.5

C) 3

D) 15

• question_answer25) A particle of mass m is executing damped oscillations. The force acting on the particle is given by the equation

A) $F=-k{{x}^{2}}-kv(t)$

B) $F=-kx-k{{d}^{2}}x/d{{t}^{2}}$

C) $F=-k{{x}^{2}}-kdx/dt$

D) $F=-kx-kdx/dt$

• question_answer26) If a spring of force constant$k$is divided into n equal parts and one such part is attached to a mass m then the period is given by

A) $T=2\pi \sqrt{m/k}$

B) $T=2\pi \sqrt{nm/k}$

C) $T=2\pi n\sqrt{m/k}$

D) $T=2\pi \sqrt{m/nk}$

• question_answer27) Physical significance of the first law of thermodynamics is that in a process involving heat.... remains constant.

A) total energy

B) kinetic energy of the molecules

C) internal energy

D) temperature

• question_answer28) A system in going from$i$to$f$via a, as shown in the figure, does work of 30 cal and absorbs 40 cal heat. In going from$f$to$i$along the curved path, work done is$-5\text{ }cal$and the heat absorbed in cal, is

A) $-15$

B) $+15$

C) $+5$

D) $-5$

• question_answer29) An irreversible engine works between$500{}^\circ K$ and$200{}^\circ K$. Its efficiency is

A) 0.6

B) 0.7

C) 0.8

D) none of the above

• question_answer30) Water boils at$100{}^\circ C$and freezes at$0{}^\circ C$at sea level atmospheric pressure. At higher pressure, water will boil at a

A) lower temperature and ice melts at a lower temperature

B) lower temperature and ice melts at a higher temperature

C) higher temperature and ice melts at a higher temperature

D) higher temperature and ice melts at a lower temperature

• question_answer31) In a series LCR circuit the resonance frequency is

A) $2\pi \sqrt{LC}$

B) $\sqrt{LC}$

C) $\frac{1}{2\pi \sqrt{LC}}$

D) $\frac{2}{\sqrt{LC}}$

• question_answer32) A magnet is allowed to fall through a metal ring. Its acceleration a during the fall is

A) $a<g$

B) $a>g$

C) $a=g$

D) $a=2g$

• question_answer33) A magnet 20 cm long and having a pole strength of 5 units is deflected through$30{}^\circ$from the magnetic meridian. If the earths magnetic field is 0.32 oersted, value of the deflecting couple will be, in dynes cm.

A) 16

B) 8

C) 4

D) 2

• question_answer34) A charge particle experiences maximum force in a magnetic field when it is

A) at rest

B) moving in the direction of the field

C) moving in a direction making an angle of 45 to the field

D) moving perpendicular to the direction of the field

• question_answer35) The weight of a horizontal current carrying wire can be supported by a magnetic field which is

A) horizontal and perpendicular to the wire

B) horizontal and parallel to the wire

C) vertical upward

D) vertical downward

• question_answer36) In a thermocouple, the neutral temperature is$270{}^\circ C$What will be the temperature of inversion if the temperature of the cold junction is$20{}^\circ C$?

A) $560{}^\circ C$

B) $520{}^\circ C$

C) $540{}^\circ C$

D) $500{}^\circ C$

• question_answer37) In the adjoining circuit, potential difference between points 2 and 5, in volts, is

A) 2.5

B) 5.0

C) 7.5

D) 10.0

• question_answer38) A high voltage electrical cable consists of a steel core surrounded by six aluminium conductors. If the resistance of the steel core is${{R}_{s}}$and that of the aluminuium conductors is ${{R}_{a}},$the resistance of the composite cable is

A) ${{R}_{s}}+6{{R}_{a}}$

B) $\frac{1}{{{R}_{s}}}+\frac{1}{6{{R}_{a}}}$

C) $\frac{{{R}_{s}}{{R}_{a}}}{{{R}_{s}}+6{{R}_{a}}}$

D) $\frac{{{R}_{s}}{{R}_{a}}}{6{{R}_{s}}+{{R}_{a}}}$

• question_answer39) Resistivity of a conductor increases with temperature because

A) number of free electrons increases

B) number of free electrons decreases

C) mean free path of free electrons increases

D) mean free path of free electrons decreases

• question_answer40) A capactior of$3\mu F$capacity can be formed by connecting three$2\mu F$capacitors as in

A)

B)

C)

D)

• question_answer41) A zero magnitude star has luminosity ${{I}_{0}}=2.52\times {{10}^{-8}}W{{m}^{-2}}$. Luminosity of a$-10$ magnitude star is

A) $2.52\times {{10}^{-4}}W{{m}^{-2}}$

B) $2.52\times {{10}^{-5}}W{{m}^{-2}}$

C) $2.52\times {{10}^{-6}}W{{m}^{-2}}$

D) $2.52\times {{10}^{-7}}W{{m}^{-2}}$

• question_answer42) The following circuit is functionally equivalent to

A) AND gate

B) NOR gate

C) NAND gate

D) none of these

• question_answer43) If${{I}_{0}}$and${{I}_{d}}$denote drift and diffusion current respectively in a forward biased junction diode, then

A) ${{I}_{d}}<<{{I}_{0}}$

B) ${{I}_{d}}>>{{I}_{0}}$

C) ${{I}_{d}}={{I}_{0}}$

D) ${{I}_{0}}=0$

• question_answer44) A sample of radioactive substance has$8\times {{10}^{8}}$nuclei. Its half life is 20 minutes. The number of nuclei that will decay in one hour is

A) $2\times {{10}^{8}}$

B) $4\times {{10}^{8}}$

C) $1\times {{10}^{8}}$

D) $7\times {{10}^{8}}$

• question_answer45) In the hydrogen spectrum, spectral lines which are emitted due to the jump of electron from a higher orbit to the innermost orbit, correspond in frequency to the region.

A) visible

B) ultraviolet

C) infrared

D) all of the above

• question_answer46) The de Broglie wavelength of a particle having mass m and velocity v is

A) directly proportional to its mass

B) directly proportional to its energy

C) inversely proportional to its momentum

D) directly proportional to its momentum

• question_answer47) The maximum frequency of continuous X-rays emitted from an X-ray tube operating at an accelerating voltage V depends

A) nature of target material

B) nature of the gas in tube

C) current in the tube

D) accelerating voltage applied

• question_answer48) If Youngs double slit experiment is performed using two identical conventional sources of light instead of two slit and one source then

A) the interference fringes will be brighter

B) no fringes will be obtained

C) the interference fringes will be darker

D) the contrast between bright and dark fringes will increase

• question_answer49) In a telescope, the distance between the objective and the eye piece is 24.0 cm. The focal length of the objective is 18.0 cm. Its magnifying power is

A) 3.0

B) 3/2

C) 2/3

D) 0.3

• question_answer50) The focal length of a convex lens made of glass${{(}^{a}}{{\mu }_{g}}=1.5)$is 40 cm. When the lens is completely immersed in water${{(}^{a}}{{\mu }_{w}}=1.33)$its focal length, in cm, will be about

A) 60

B) 80

C) 120

D) 155

• question_answer51) Match List-I and List-II and select the correct answer using the code given below the lists

 List-I (outer electronic configuration) List-II (types of elements) A. $[Ne]3{{s}^{1}}$ 1. alkali metal B. $[Ne]3{{s}^{2}}3{{p}^{5}}3{{d}^{0}}4{{s}^{0}}$ 2. halogens(non-metallic) C. $[Ar]3{{s}^{5}}4{{s}^{1}}$ 3. transition element D. $[He]2{{s}^{2}}2{{p}^{6}}3{{s}^{0}}$ 4. inert (non-reactive) 5. inner transition 6. alkaline earth metals

A) A-1, B-2, C-5, D-4

B) A-1, B-2, C-3, D-4

C) A-6, B-3, C-1, D-2

D) A-3, B-6, C-1, D-4

• question_answer52) Lucas test is used to determine the type of

A) alcohols

B) aldehydes

C) acids

D) phenols

• question_answer53) Which one of the following pressure versus volume plots represents Boyles Law? (see the accompanied diagram).

A) line AB

B) line COD

C) line EF

D) line GH

• question_answer54) Which of the following statements is incorrect in respect of ideal gaseous behaviour?

A) all the molecules are identical and have intermolecular force of attraction

B) the gaseous molecules exchange energies during molecular collisions

C) the collisions are inelastic

D) all the above

• question_answer55) Hofmann bromamide reaction is used to prepare

A) primary amine

B) secondary amine

C) tertiary amine

D) all the above

• question_answer56) Which one of the following is incorrect for the Bohr model of hydrogen atom?

A) $\frac{Z{{e}^{2}}}{{{r}^{2}}}=\frac{m{{v}^{2}}}{{{r}^{2}}}$

B) angular momentum is quantized

C) mass of proton is ignored

D) none of the above

• question_answer57) The IUPAC name of $C{{H}_{3}}-C{{H}_{2}}-\underset{\begin{smallmatrix} | \\ C{{H}_{2}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}} \end{smallmatrix}}{\mathop{CH-C{{H}_{2}}-C{{H}_{3}}}}\,$

A) 4-Ethyl-2-methylhexane

B) 2-Methyl-4-ethylhexane

C) 3-lsobutylpentane

D) 2-Ethyl-isopropylbutane

• question_answer58) Heisenbergs uncertainty in position and momentum is shown by

A) $\Delta x.\Delta p\ge \frac{{{h}^{2}}}{4\pi }$

B) $\Delta x.\Delta p\ge \frac{h}{2\pi }$

C) $\Delta x.\Delta p\ge \frac{h}{4\pi }$

D) none of the above

• question_answer59) Which one gives secondary alcohol when treated with Grignard Reagent?

A) $HCHO$

B) $C{{H}_{3}}CHO$

C) ${{(C{{H}_{3}})}_{2}}CO$

D) All the above

• question_answer60) For isothermal change in the case of an ideal gas

A) $\Delta C=\Delta H-T\Delta S$

B) $\Delta C=-T\Delta S$

C) $\Delta A\text{ }=\Delta E-T\Delta S$

D) None of the above

• question_answer61) Which of the following compound gives formic acid on hydrolysis?

A) $C{{H}_{3}}Cl$

B) $C{{H}_{2}}Cl$

C) $CHC{{l}_{3}}$

D) $C{{H}_{3}}C{{H}_{2}}Cl$

• question_answer62) The electropositive character decreases from

A) Li to Cs (lithium to cesium) in the 1 group

B) $Cl$to$I$(chlorine to iodine) in the VII group

C) $Al$to Na (aluminium to sodium) in the same period

D) none of the above

• question_answer63) Intramolecular hydrogen bonding is found in

A) p-niiro phenol

B) o-nitro phenol

C) w-nitro phenol

D) phenol

• question_answer64) Assertion: The rate of a reaction is enhanced in the presence of a positive catalyst. Reason: The positive catalyst provides an alternative path of higher activation energy

A) both assertion and reason are true, and reason is the correct explanation of assertion

B) both assertion and reason are true but reason is NOT the correct explanation of assertion

C) asserton is true but reason is false

D) both assertion and reason are false

• question_answer65) The most unlikely representation of resonance structure of$p-$nitrophenoxide ion is

A)

B)

C)

D)

• question_answer66) The solubility product of$AgCl$is$4.0\times {{10}^{-10}}$at 298 K. The solubility of$AgCl$in$0.04M\text{ }CaC{{l}_{2}}$ will be

A) $2.0\times {{10}^{-5}}M$

B) $1.0\times {{10}^{-4}}M$

C) $5.0\times {{10}^{-9}}M$

D) $2.2\times {{10}^{-4}}M$

• question_answer67) Which one of the following statements is not true?

A) variable valencies are shown by the transition elements.

B) electrons enter into the$3d-$orbitals in the first series of the transition elements.

C) electropositive character decreases in lanthanide elements because of lanthanide contraction.

D) none of the above

• question_answer68) Pernicious Anaemia is caused due to the deficiency of vitamin

A) ${{B}_{1}}$

B) ${{B}_{2}}$

C) ${{B}_{6}}$

D) ${{B}_{12}}$

• question_answer69) Assertion: Spin quantum number can have the value$+{\scriptstyle{}^{1}/{}_{2}}$ or$-{\scriptstyle{}^{1}/{}_{2}}$. Reason: (+) sign here signifies the wave function.

A) both assertion and reason are correct and reason is the correct explanation of assertion

B) both assertion and reason are correct and reason is the not correct explanation of assertion

C) assertion is true but reason is false

D) both assertion and reason are false

• question_answer70) Which one will give positive iodoform test?

A) ethanol

B) propanone

C) 2-Propanol

D) all the above

• question_answer71) In${{H}_{2}}$molecule, each of the two electrons

A) is attracted by its own nucleus in accordance with the valence bond treatment:

B) is attracted by both the nuclei in the light of the molecular orbital consideration:

C) is attracted by both the nuclei in MO consideration and also they experience repulsion among themselves besides nuclear repulsion.

D) behave as stated above (a to c) in accordance with the VB and MO treatments.

• question_answer72) Which of the following statements is not correct for an electron that has the quantum number$n=4$and$m=2$?

A) the electron may have the quantum number $s=+\text{ }1/2$

B) the electron may have the quantum number$l=2$.

C) the electron may have the quantum numbers $l=3$

D) the electron may have the quantum numbers$l=0,1,2$

• question_answer73) A bond order of value 1/2 is found in

A) $He_{2}^{+}$

B) $H_{2}^{+}$

C) $He_{2}^{+}$and $H_{2}^{+}$

D) all the above

• question_answer74) Which one of the following compounds on nitration easily produces nitro derivative?

A) ${{C}_{6}}{{H}_{6}}$

B) ${{C}_{6}}{{H}_{5}}N{{O}_{2}}$

C) ${{C}_{6}}{{H}_{5}}C{{H}_{3}}$

D) ${{C}_{6}}{{H}_{5}}OC{{H}_{3}}$

• question_answer75) The correct outer electronic configuration of chromium atom is

A) $[Ar]3{{d}^{5}}4{{s}^{1}}$

B) $[Ar]3{{d}^{4}}4{{s}^{2}}$

C) $[Ar]3{{d}^{6}}$

D) $[Ar]3{{d}^{0}}4{{s}^{2}}4{{p}^{4}}$

• question_answer76) The formation of the product is facilitated by increasing the pressure in

A) ${{N}_{2}}(g)+{{O}_{2}}(g)2NO(g)$

B) $2N{{H}_{3}}(g){{N}_{2}}(g)+3{{H}_{2}}(g)$

C) $2NO(g){{N}_{2}}(g)+{{O}_{2}}(g)$

D) none of the above

• question_answer77) The de Broglie relation is obtained by equating

A) $E={\scriptstyle{}^{1}/{}_{2}}m{{c}^{2}}$and $E=h\upsilon$

B) $E=m{{c}^{2}}$and $E=h\upsilon$

C) $E={{p}^{2}}/2m$and $E=h\upsilon$

D) none of these.

• question_answer78) X on oxidation with alkaline$KMn{{O}_{4}}$gives benzoic acid. The X may be

A)

B)

C)

D) all of the above

• question_answer79) In the mixtures of two miscible volatile liquids obeying Raoults law, the correct behaviour is explained by

A) AB stands for the vapour pressure of component B in presence of solute A

B) CD stands for the vapour pressure of solvent A in presence of solute B

C) BC stands for the total vapour pressure in accordance with the Daltons law of partial pressures

D) all of the above

• question_answer80) Octahedral, tetrahedral, and planar metal complexes have, respectively,

A) ${{d}^{2}},s{{p}^{3}},s{{p}^{3}},$and$s{{p}^{2}}$hybridisation

B) $s{{p}^{3}}{{d}^{2}},s{{p}^{3}},$and$sp$hybridisation

C) ${{d}^{2}}s{{p}^{3}}$or$s{{p}^{3}}{{d}^{2}},s{{p}^{3}},$and$ds{{p}^{2}}$hybridization

D) ${{d}^{2}}s{{p}^{3}},s{{p}^{3}},$and$s{{p}^{3}}{{d}^{2}}$hybridization

• question_answer81) The oxidation states of$Mn$in$MnS{{O}_{4}},Mn{{O}_{2}}$ ${{K}_{2}}Mn{{O}_{4}}$and$KMn{{O}_{4}}$are respectively

A) 1, 2, 4, 4

B) 2, 4, 6, 7

C) 1, 2, 4, 6

D) 2, 4, 7, 6

• question_answer82) The$_{92}{{U}^{238}}$absorbs a thermal neutron. The correct sequence of radioactive decay, is [A]$_{92}{{U}^{238}}{{+}_{0}}{{n}^{1}}{{\to }_{92}}{{U}^{239}}\xrightarrow[{{\frac{^{t}1}{2}}^{-23\,\min }}]{{}}93\,N{{p}^{239}}+{{\beta }^{-}}$ [B] $_{93}N{{p}^{239}}{{\xrightarrow[{{\frac{^{t}1}{2}}^{-2-3day}}]{{}}}_{24}}P{{u}^{293}}+{{\beta }^{-}}$ [C] $_{94}P{{u}^{239}}\xrightarrow[\begin{smallmatrix} by\,thermal\,neutron \\ \left( {{\frac{^{t}1}{2}}^{-24.000\,yrs}} \right) \end{smallmatrix}]{fissionable}{{\,}_{92}}{{U}^{235}}+\alpha$is shown by

A) A and B

B) B and C

C) C and A

D) all of these

• question_answer83) Lowering of vapour, pressure,$\Delta p$: elevation in boiling point.$\Delta {{T}_{b}}$: and depression in freezing point,$\Delta {{T}_{f}}$of a solvent for the same molar concentration of each of the three solutes: [A] sugar, [B]$NaCl,$ and [C]$BaC{{l}_{2}}$follow the sequence:

A) $\Delta p:A<B<C$

B) $\Delta {{T}_{b}}:C>B>A$

C) $\Delta {{T}_{f}}:A<B<C$

D) all of these

• question_answer84) In 0.1 M solutions of each of the following: Sucrose,$NaCl,$and$MgC{{l}_{2}},$the solutes will depress the freezing point of the solvent in the order:

A) $sucrose>NaCl>MgC{{l}_{2}}$

B) $NaCl>MgC{{l}_{2}}>sucrose$

C) $MgC{{l}_{2}}>sucrose>NaCl$

D) $MgC{{l}_{2}}>NaCl>sucrose$

• question_answer85) Which one among the following contains a phenolic$-OH$group

A) citric acid

B) picric acid

C) formic acid

D) oxalic acid

• question_answer86) The work done in expansion of an ideal gas from an initial volume${{V}_{1}}$to a final${{V}_{2}}$litres against a pressure of 1 atm at 300 K is

A) $2.303R\times 300\,log({{V}_{2}}/{{V}_{1}})$

B) $2.303R\times 300\,log({{V}_{1}}/{{V}_{2}})$

C) $1\text{ }atm\times ({{V}_{2}}/{{V}_{1}})\text{ }litre$

D) zero

A) $\Delta E$or$\Delta U$must decrease

B) $\Delta H$ must decrease

C) $\Delta S$ must decrease

D) $\Delta G$must decrease

• question_answer88) Which of the following depends on the path followed?

A) internal energy change

B) enthalpy change

C) work done

D) free-energy change

• question_answer89) The final product of the following sequence of reactions is $C{{H}_{3}}Br+Mg\xrightarrow[{}]{Ether}A\xrightarrow[{}]{HCHO}B\xrightarrow[{}]{{{H}_{2}}O}C$

A) acetic acid

B) acetaldehyde

C) ethyl alcohol

D) formic acid

• question_answer90) Caprolactum is the monomer of

A) nylon-6

B) glyptal

C) dacron

D) melamine

• question_answer91) Which one of the following statements is incorrect?

A) ionisation potential decreases in a group while atomic volume increases

B) electron affinity increases from V to VII groups

C) transition metals give coloured ions and exhibit variable valencies

D) none of these

• question_answer92) Acetic acid shows twice of its expected molecular weight value experimentally. This is because of

A) its dissociation into${{H}^{+}}$and$C{{H}_{3}}CO{{O}^{-}}$ ions

B) colligative property measurement

C) molecular association through H-bonding

D) none of the above

• question_answer93) Which one of the following acids would you expect to be the strongest?

A) $FC{{H}_{2}}COOH$

B) $ClC{{H}_{2}}COOH$

C) $BrC{{H}_{2}}COOH$

D) $lC{{H}_{2}}COOH$

• question_answer94) Match List 1 and List 2 and select the correct answer, using the codes given below the lists.

 Match: List 1 (compounds) List 2 (types of bond) A. $MgO$ 1. Electrovalent B. ${{H}_{2}}$ 2. Covalent C. $Cu[N{{H}_{3}}]_{4}^{++}$ 3. Coordinate 4. Hydrogen bond

A) A-1, B-2, C-3

B) A-1, B-4, C-3

C) A-2, B-4, C-1

D) A-3, B-2, C-1

• question_answer95) The reducing reagent in Clemmensen reduction is

A) $LiAl{{H}_{4}}$

B) $Zn-NaOH$

C) $Na-NaOH$

D) $Zn-Hg-HCl$

• question_answer96) Assertion: According to Arrhenius equation $K=A{{e}^{-{{E}_{a}}/RT}},$ ne energy of activation is independent of temperature. Reason: The plot of log k versus 1/T is linear

A) assertion and reason both are correct and reason is the correct explanation of assertion

B) assertion and reason both are correct but reason is NOT the correct explanation of assertion

C) assertion is true but reason is false

D) both assertion and reason are false

• question_answer97) Assertion: The reaction.$A+B$(excess)$\xrightarrow[{}]{k}C,$for which$\xrightarrow[dt]{d[C]}\propto [A],$follows the first order kinetics. Reason: The order of a reaction is the number of molecules whose concentration determines the rate of reaction at a given temperature.

A) both assertion and reason are true: and reason is the correct explanation of assertion

B) both assertion and reason are true: but reason is NOT the correct explanation of assertion

C) assertion is true but reason is false

D) assertion is false but reason is true

• question_answer98) The amphoteric behaviour is shown by

A) ${{H}_{2}}C{{O}_{3}}$and $HCO_{3}^{-}$

B) ${{H}_{2}}C{{O}_{3}}$and${{H}_{2}}O$

C) $HCO_{3}^{-}$ and ${{H}_{3}}{{O}^{+}}$

D) none of the above

• question_answer99) The incorrect match for the pH values and the corresponding concentration for the aqueous solutions of$HCl,\text{ }NaCl,$and$NaOH$is shown by

A) \begin{align} & \frac{HCl}{pHconcn(m/l)}\frac{NaCl}{pHconcn(m/l)}\frac{NaOH}{pHconcn(m/l)} \\ & \,\,\,\,\,\,\,\,\,3\times {{10}^{-3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,7\times {{10}^{-5}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,11\times {{10}^{-3}} \\ \end{align}

B) \begin{align} & \frac{HCl}{pHconcn(m/l)}\frac{NaCl}{pHconcn(m/l)}\frac{NaOH}{pHconcn(m/l)} \\ & \,\,\,\,\,\,\,\,\,\,4\times {{10}^{-4}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,5\times {{10}^{-5}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,10\times {{10}^{-4}} \\ \end{align}

C) \begin{align} & \frac{HCl}{pHconcn(m/l)}\frac{NaCl}{pHconcn(m/l)}\frac{NaOH}{pHconcn(m/l)} \\ & \,\,\,\,\,\,\,\,\,\,5\times {{10}^{-5}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,7\times {{10}^{-7}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,9\times {{10}^{-5}} \\ \end{align}

D) \begin{align} & \frac{HCl}{pHconcn(m/l)}\frac{NaCl}{pHconcn(m/l)}\frac{NaOH}{pHconcn(m/l)} \\ & \,\,\,\,\,\,\,\,\,6\times {{10}^{-6}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,7\times {{10}^{-6}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,8\times {{10}^{-6}} \\ \end{align}

• question_answer100) Methyl bromide and ethyl bromide are mixed in equal proportion and the mixture is treated with sodium, the number of possible organic products is

A) 1

B) 2

C) 3

D) 4

• question_answer101) The smallest known agents of the infection disease are

A) viruses

B) mycoplasma

C) viroids

D) actinomycetes.

• question_answer102) The best stage to produce haploid through anther culture is

A) microspore mother cells

B) microspores

C) 2- celled pollen grains

D) all of the above.

• question_answer103) If a sporangium develops from a group of cell, the development of sporangium is known as

A) heterosporangiate

B) homosporangiate

C) eusporangiate

D) leptosporangiate.

• question_answer104) The first stable compound in Hatch Slack pathway is

A) phosphoglyceric acid

B) lactic acid

C) oxalo acetic acid

D) none of the above.

• question_answer105) Agar - agar which is extensively used in all microbiological studies and culture media is an important product of sea resources and is obtained from which group of algae?

A) brown algae

B) green algae

C) red algae

D) diatoms & dinoflagellates.

A) DNA$+$protein

B) RNA$+$protein

C) RNA$+$iipid

D) RNA$+$phosphate.

• question_answer107) Which one of the following plant is most commonly used as green manure?

A) Dalbergia sissoo

B) Polyaithea

C) Sesbania aculeate

D) none of these.

• question_answer108) If a fruit is developed from bicarpellary syncarpus inferior ovary with basal placement and with a single ovule, the fruit is termed as

A) silique

B) cypsela

C) silicula

D) lomentun.

• question_answer109) Which of the following statements is correct?

A) during meiosis cytokinesis generally takes place

B) during meiosis cytokinesis may not take place

C) during meiosis cytokinesis takes place after first phase of meiosis and does not take place after second phase of meiosis

D) all of the above.

• question_answer110) The first step in photosynthesis is

A) formation of ATP

B) ionization of water

C) excitation of an electron of chlorophyll

D) attachment of$C{{O}_{2}}$to carbon sugar.

• question_answer111) The ovule during its development undergoes $180{}^\circ$curvature bringing the micrbpyle and chalaza in a line. The development of ovule conforms to

A) circinotropous

B) atropous

C) anatropous

D) amphitropous.

• question_answer112) When the movement of plant or plant body is governed by the external stimulus it is known as

A) paratonic movement

B) automonic movement

C) nastic movement

D) none of the above.

• question_answer113) Senescence of plant organs is delayed by the application of

A) auxin

B) gibberellin

C) cytokinin

D) ethylene.

• question_answer114) During anther wall development if the middle layer is contributed by the inner secondary parietal layer, the development of anther wall layer conforms to

A) dicotyledonous

B) monocotyledonous

C) basic type

D) reduced type.

• question_answer115) Kranz type of leaf anatomy is found in

A) ${{C}_{1}}$ plants

B) ${{C}_{4}}$plants

C) ${{C}_{3}}$plants

D) ${{C}_{2}}$plants.

A) cyclic photophosphorylation

B) non - cyclic photophosphorylation

C) oxidative photophosphorylation

D) none of the above.

• question_answer117) How many meiotic divisions would be required to produce 101 maize grains?

A) 101

B) 26

C) 127

D) none of these.

• question_answer118) Which one of the following decides cell to divide?

A) ${{G}_{1}}$phase

B) ${{G}_{2}}$phase

C) S phase

D) none of these.

• question_answer119) The exact amount of energy available from each ATP (a part of the energy is lost as heat) is approximately

A) 7 K. calories

B) 10 K. calories

C) 5 K. calories

D) 15 K. calories.

• question_answer120) Which of the following is a source of variation?

A) mutation

B) recombination

C) translocation

D) all of these.

• question_answer121) Which one of the following occurs in radioactive fallout and behaves like calcium in biogeochemical cycling of material in ecosystem?

A) strontium - 30

B) cobalt - 60

C) cesium-137

D) none of these.

• question_answer122) The formula for chlorophyll a is

A) ${{C}_{55}}{{H}_{70}}{{O}_{6}}{{N}_{4}}Mg$

B) ${{C}_{55}}{{H}_{72}}{{O}_{5}}{{N}_{4}}Mg$

C) ${{C}_{22}}{{H}_{72}}{{O}_{5}}{{N}_{4}}Mg$

D) ${{C}_{22}}{{H}_{72}}{{O}_{5}}{{N}_{4}}Mg$

• question_answer123) Degenerate codes are when

A) the codons degenerate soon after the synthesis of polypeptide chain

B) one codon can code for more than one amino acids

C) a codon is non-functional and is also known as non-sense codon

D) the same amino acid can be coded by more than one codon.

• question_answer124) Which one of the following element is responsible for Minamata diseases which is prevalent in industrial area due to pollution?

C) mercury

D) zinc.

• question_answer125) In our biosphere, the most important and vast area is covered by hydrosphere. Hydrosphere has

A) 1.4 billion cubic km of water

B) 1.4 million cubic km of water

C) 2.5 billion cubic km of water

D) 1.5 billion cubic km of water.

• question_answer126) The primary function of the light reaction of photosynthesis is

A) production of ATP

B) production of $ATP+NADP{{H}_{4}}$

C) absorption of light

D) manufacture of food.

• question_answer127) Myrmecophilly is a beneficial association between some flowering plants such as Cassia etc. and

A) bacteria

B) mycoplasma

C) mycorrhiza

D) ants.

• question_answer128) If the number of chromosomes in the pollen grains of Pinus is 12, what would be the number of chromosomes in its endosperm?

A) 12

B) 36

C) 6

D) none of these.

• question_answer129) A class of mutation induced by addition or deletion of a nucleotide is called

A) missense

B) nonsense

C) substitution

D) frameshift.

• question_answer130) If the cell ca of 2-celled proembryo divides transversely, the embryo development may conform to

A) actinomycetes only

B) cyanobacteria only

C) actinomycetes and cyanobacteria

D) none of the above.

• question_answer132) Chipko Andolan (movement) which was started in 1970 in Garhwal Himalayas (Gopeshwar) near Alaknand river was for the first time started by

A) Baba Amte

B) Maneka Gandhi

D) Sunder Lal Bahuguna.

• question_answer133) In a vertical section of a dorsiventral leaf, phloem in the midrib vascular strand

A) is not distinct

B) faces abaxial side

D) is surrounded by metaxylem

• question_answer134) A natural phenomenon is commonly observed in lakes, ponds and ditches that there is a rich growth of algae and other micro-organisms which consume much of the dissolved oxygen, resulting the death of fish at night. The phenomenon is termed as

A) litterization

B) transmigration

C) eutrophication

D) estuarization.

• question_answer135) When a fungus completes its life cycle on two hosts, it is called

A) heterothallic

B) monothallic

C) heteroecious

D) autoecious.

• question_answer136) In order to reduce expenses over plantation for afforestation programme under the Social Forestry, a system has been developed which include forestry and agriculture. The system is named as

A) selective harvest system

B) taungya system

C) jhum cultivation

D) block system.

• question_answer137) The pyramid of biomass would be inverted in

A) forest ecosystem

B) marine ecosystem

C) grass land ecosystem

D) none of the above.

• question_answer138) When there is a bunch of flagella on one side, the bacteria are known as

A) lophotrichous

B) amphitrichous

C) peritrichous

D) none of these.

• question_answer139) Reindeer Moss, a very important product in tundra biome and which constitutes the starting point to food chain in this region belongs to

A) pteridophyta

B) bryophyta

C) lichens

D) none of these.

• question_answer140) The sequence and kinds of amino acids in a particular protein are determined by a sequence of

A) two nucleotides

B) three nucleotides

C) four nucleotides

D) five nucleotides.

• question_answer141) Subabul a fast growing tree and extensively used in social forestry programme to generate cheap fuel for rural population is botanically known as

A) Acacia nilotica

B) Parkinsonia aculeata

C) Lezicaena leucocephala

D) Simmondsia chinensis.

• question_answer142) Simmondsia chinensis is an oil yielding plant of Mexico and it has been recently introduced in Indian deserts. What is the common name of this plant?

A) subabul

B) gauynie

C) winged bean

D) jojoba.

• question_answer143) If the decomposers from an ecosystem go on strike from functioning as decomposers, the functioning of ecosystem will be adversely affective because

A) energy flow in an ecosystem will be blocked

B) cycling of mineral and material will be stopped

C) both [a] and [b]

D) adversely affected for a short period and then function normally

• question_answer144) Which one of the following plants is used in paint and varnish industry?

A) Abies

B) Cedrus deodara

C) Pinus roxburghii

D) Pinus gerardiana.

• question_answer145) Which one of the following is M.F.P?

A) timber

B) resin and gums

C) plywood

D) lumber.

• question_answer146) A typical foliage leaf comprises

A) hypopodium

B) mesopodium

C) epipodium

D) all of these.

• question_answer147) Intergeneric crosses are rarely successful through usual breeding techniques. Which of the following may be used to achieve success in this regard?

A) embryo culture

B) hybridoma technique

C) somatic hybridization

D) none of the above.

• question_answer148) The plant cells commonly without nucleus among the following are

A) sieve tube elements

B) roots hairs

C) companion cells

D) albuminous cells.

• question_answer149) Prokaryotic flagella are having

A) unit membrane - enclosed fibre.

B) helically arranged protein molecule

C) microtubular$9+2$membrane enclosed structure

D) protein membrane enclosed fibre.

• question_answer150) Goldfussia is an example of____where the leaves of different size are present in opposite phyllotaxy.

A) heterophylly

B) anisophylly

C) opposite decussate

D) none of these.

• question_answer151) . The area cribrosa occurs at

A) base of medullary pyramid

B) tip of medullary pyramid

C) the major calyx

D) the pelvis.

• question_answer152) One major change accompanying the evolution of homo from australopithecus was

A) bipedal locomotion

B) decrease in body size

C) increase in brain size

D) uniformity of teeth.

• question_answer153) Coral reef formation is mainly related to

A) sponges

B) anthozoans

C) molluscs

D) hydrozoans.

• question_answer154) Under the wild life protection Act of the Government of India, the Indian elephant is in the category of

A) protected species

B) endangered species

C) vulnerable species

D) rare species.

• question_answer155) Edward Jenner was the first person who

A) tried to develop vaccine

B) discovered penicillin

C) introduced the term cell

D) discovered the life of malaria in mosquito.

• question_answer156) The organic compound having polyhydroxy aldehydes or ketones is

A) carbohydrate

B) lipid

C) protein

D) vitamin.

• question_answer157) Animal requiring minimum amount of water to produce urine are

A) ureotelic

B) ammonotelic

C) uricotelic

D) chemotelic.

A) heterozygous

B) hemizygous

C) autozygous

D) allozygous

• question_answer159) Which is not related with eukaryotic$mRNA$?

A) intron, exon

B) ribosomes binding site

C) poly A tail, Gppp Cap

D) okazaki piece.

• question_answer160) The respiratory and cardiac centres are located in

A) cerebrum

B) diencephalons

C) crura cerebri

D) medulla oblongata.

• question_answer161) By weight the most abundant element in a cell is

A) carbon

B) hydrogen

C) oxygen

D) sodium.

• question_answer162) A child (foetus) may die if

A) mother is$R{{h}^{+}}$ and father $R{{h}^{-}}$

B) father is$R{{h}^{+}}$and mother$R{{h}^{-}}$

C) father is$R{{h}^{+}}$and mother$R{{h}^{-}}$

D) father is$R{{h}^{+}}$and so is mother.

• question_answer163) All sensory information to be registered consciously by the forebrain must pass via the

A) thalamus

B) reticular formation

C) cerebellum

D) pons.

• question_answer164) A sex-linked disease which is lethal, not connected with blood and changes the sex ratio is

A) colourblindness

B) muscular dystrophy

C) G6PD deficiency

D) haemophilia A and B.

• question_answer165) Beer and buttermilk are the products of fermentation brought about by a microscopic organism called

A) Saccharomyces cerevisae

B) Rhizopus stolonifer

C) Caedibacter taeniospiralis

D) Bacillus subtilis.

• question_answer166) Which one of the following forms of RNAs is involved in receiving the message of genetic code from DNA for translation during protein synthesis?

A) $rRNA$

B) $mRNA$

C) $tRNA$

D) all of these.

• question_answer167) Which of the following groups contain both DNA and RNA?

A) bacteria and higher organisms

B) tobacco mosaic virus and poliomyelitis virus

D) human immuno deficiency virus and papilloma virus.

• question_answer168) The stage of meiosis where in the centromere divides for the first and the only time, ensuring separation of daughter chromosomes, occur in

A) anaphase II

B) telophase I

C) anaphase I

D) telophase II

• question_answer169) In which substage ofprophase I, pairing between homologous chromosomes is completed throughout whole length and pairs are referred to as biyalents?

A) diplotene

B) zygotene

C) leptotene

D) pachytene

• question_answer170) The element particles on mitochondria are concerned with

A) glycolysis

B) breakdown of ATP

C) Krebs cycle

D) oxidative phosphorylation.

• question_answer171) Restriction enzymes recognize and cleave/cut at specific site of the molecules of

A) DNA

B) carbohydrates

C) fats

D) vitamins.

• question_answer172) A species with several subspecies is called a

A) polytypic species

B) polytopic species

C) superspecies

D) monotypic species.

• question_answer173) An enzyme which has multiple molecular forms in the same organism is termed as

A) isozyme

B) isoenzyme

C) holoenzyme

D) apoenzyme.

A) large nuclei

B) single large nucleus

C) large and small nuclei

D) no defined nucleus.

• question_answer175) The reaction between antibodies and soluble antigens is

A) agglutination

B) neutralization

C) precipitation

D) lysis.

• question_answer176) Release of neurotransmitter substance at the presynaptic membrane is medicated by

A) Na ions

B) Ca ions

C) K ions

D) Mg ions.

• question_answer177) Mammary gland is an example of a compound

A) tubular gland

B) alveolar glands

C) tubulo - alveolar gland

D) saccular gland.

• question_answer178) Transmission of signals or impulse through a nerve is

A) physical phenomenon

B) chemical phenomenon

C) physico - chemical phenomenon

D) mechanical phenomenon.

A) hormone

B) transmitter hormone

C) polysaccharide

D) enzyme.

• question_answer180) Which one of the following will be untenable nucleotide combination?

A) phosphate - deoxyribose - uracil

B) phosphate - ribose-uracil

D) phosphate - deoxyribose - cytosine.

• question_answer181) The binomial system of nomenclature now followed universally, was first proposed by

A) Aristotle

B) Caroleus Linnaeus

C) G. Simpson

D) E. Mayr.

• question_answer182) Which of the following hormone is necessary for the development of secondary sexual characters, in mammals including human beings?

A) progesterone

B) FSH

C) testosterone

D) estrogen.

• question_answer183) Vitamin${{B}_{12}}$is also known as

A) riboflavin

B) pyridoxine

C) folic acid

D) cdbalamine.

• question_answer184) The disorders of AIDS is characterized by

A) decrease in the number of killer T-cells

B) decrease in the number of suppressor T-cells

C) decrease in the number of helper T-cells

D) increase in the number of helper T-cells.

• question_answer185) Beri beri is caused by the deficiency of

A) thiamine

B) niacin

C) folic acid

D) biotin.

• question_answer186) Sucrase hydrolysis sucrose into

A) glucose and galactose

B) glucose and fructose

C) galactose and fructose

D) glucose and ribose.

• question_answer187) Which one of the following is not a protein digesting enzyme?

A) pepsin

B) ptyalin

C) trypsin

D) chymotrypsin.

• question_answer188) One method of biotechnology for Animal Breeding Programmes to improve yield of milk/meat/wool in catties, goat, sheep, is to incorporate new/foreign genes into the genome of their fertilized eggs to produce

A) hybrids

B) ${{F}_{1}}$ generation

C) transgenic individuals

D) ${{F}_{2}}$ generation.

• question_answer189) Plasmid found in bacteria are used as vectors in molecular biology/biotechnology work. These genetic elements of bacteria are

A) chromosomal

B) extra-chromosomal

C) mitochondrial

D) none of these.

• question_answer190) Germplasm preservation at ultra-low temperatures around$-196{}^\circ C,$ is called as

A) ultra - preservation

B) cryo - preservation

C) chemical preservation

D) physical preservation.

• question_answer191) Scorpions belong to the phylum

A) annelida

B) echinodermata

C) arthropoda

D) porifera.

• question_answer192) Ommatidia are the units that constitute the compound eyes in

A) fish

B) insects

C) mammals

D) birds.

• question_answer193) Annelids like the earthworms, Pheretima posthuma, excrete urine that is

A) isotonic

B) hypertonic

C) hypotonic

D) none of these.

• question_answer194) Animals that tolerate a very narrow range of temperature fluctuation are called as

A) eurythermal

B) stenothermal

C) euryhaline

D) stenohaline.

• question_answer195) Which is related to Darwin?

A) Galapagos island

B) Andaman islands

C) Hawiian islands

D) Mauritius.

• question_answer196) Competition between individuals of the same species, is called

A) inter - specific competition

B) intra - specific competition

C) predation

D) population interaction.

• question_answer197) Population exploiting a resource rapidly, and showing unbounding increase in numbers are

A) $k-$selected

B) $r-$selected

C) growth selected

D) unselected.

• question_answer198) The essential components of ecosystem, without which ecosystems cannot function, are

A) consumer organisms

B) secondary consumer organisms

C) sunlight, green plants

D) decomposer organisms.

• question_answer199) Biosphere consists of basic units known as

A) biomes

B) regional ecosystem patterns

C) ecosystems

D) geographical patterns.

• question_answer200) Closely related species living in the same area/ habitat, are called as

A) allopatric

B) sympatric

C) allochoronic

D) siblings.