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How plants prepare their own food?
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Why our body cannot make food from the carbon dioxide, water and minerals like plants do?
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Answer the following questions
(a) Where the food factories of plants are located?
(b) How do plants obtain the raw materials from the surroundings?
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How water and minerals absorbed by roots reach the leaves?
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What is so special about the leaves that they can synthesis food but other parts of the plant cannot?
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"In the absence of photosynthesis, life is impossible on the earth". Explain.
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Some plants have deep red, violet or brown leaves. Can these coloured leaves also carry out the process of photosynthesis?
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Why algae are green in colour?
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From where do the plants obtain nitrogen?
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Are mosquitoes, bed bugs, lice and leeches that suck our blood also parasites?
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If the pitcher plant is green and carries out photosynthesis, then why does it feed on insects?
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Some organisms do not have mouths like animals. They are not like green plants as they lack chlorophyll and cannot make food by photosynthesis. How do these organisms acquire nutrients?
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Paheli is keen to know whether her beautiful shoes which she wore on special occasions, were spoiled by fungi during the rainy season. She wants to know how fungi appear suddenly during the rainy season.
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Boojho says once his grandfather told him that his wheat fields were spoiled by a fungus. He wants to know, does fungi cause diseases also?
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Farmers spread manure or fertilizers in the fields, or gardeners use them in lawns or in pots, why these are added to the soil?
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Why do organisms need to take food?
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Distinguish between a parasites and a saprotroph.
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How would you test the presence of starch in leaves?
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Give a brief description of the process of synthesis of food in green plants.
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Show with the help of a sketch that the plants are the ultimate source of food.
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Fill in the blanks.
(a) Green plants are called ......... since they synthesis their own food.
(b) The food synthesised by the plants is stored as..........
(c) In photosynthesis solar energy is captured by the pigment called..........
(d) During photosynthesis, plants take in ......... and release ......... .
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Name the following.
(a) A parasitic plant with yellow, slender and tubular stem.
(b) A plant that has both autotrophic and heterotrophic mode of nutrition.
(c) The pores through which leaves exchange gases.
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Tick (Right) the correct option.
(a) Amarbel is an example of
(i) autotroph
(ii) parasite
(iii) saprotroph
(iv) host
(b) The plant which traps and feeds on insects is
(i) Cuscuta
(ii) China rose
(iii) pitcher plant
(iv) rose
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Match the items given in Column I with those in
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Column I
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Column II
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(a) Chlorophyll
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(i) Bacteria
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(b) Nitrogen
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(ii) Heterotrophs
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(c) Amarbel
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(iii) Pitcher plant
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(d) Animals
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(iv) Leaf
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(e) Insects
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(v) Parasite
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Mark “T” if the statements is True and ‘F” if it is False.
(a) Carbon dioxide is released during photosynthesis.
(b) Plants which synthesise their food themselves are called saprotrophs.
(c) The product of photosynthesis is not a protein.
(d) Solar energy is converted into chemical energy during photosynthesis.
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Choose the correct option from the following:
(a) Which part of the plant takes in carbon dioxide from the air for photosynthesis?
(i) Root hair
(ii) Stomata
(iii) Leaf veins
(iv) Sepals
(b) Plants take carbon dioxide from the atmosphere mainly through their
(i) roots
(ii) stem
(iii) flowers
(iv) leaves
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