| I. Botli, 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. |
A) two
B) Three
C) Four
D) One
Correct Answer: A
Solution :
Symbiotic nitrogen fixing bacteria and Cyanobacteria are found in association to plant. The most common symbiotic bacteria is Rhizobium. In dicot stem, the cambium present between xylem and phloem in vascular bundles is called fascicular or intra fascicular cambium. Besides this some cells of modularly rays also become meristematic and called inter fascicular cambium.
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