| Read the following four statements (i)-(iv). |
| (I) Both photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane. |
| (II) In dicot stems, a new cambium originates from cells of pericycle at the time of secondary growth. |
| (III) Stamens in flowers of Gloriosa and Petunia are polyandrous. |
| (IV) Symbiotic nitrogen-fixers occur in free-living state also in soil. |
| How many of the above statements are correct? |
A) Two
B) Three
C) Four
D) One
Correct Answer: B
Solution :
Statement (ii) is incorrect. In dicot stems, cells of medullary rays adjoining intrafascicular cambium become meristematic and form the interfascicular cambium. Thus, a continuous ring of cambium is formed,
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