a) Both oxidative and photo-phosphorylation involve uphill transport of protons across the membrane.
b) In dicot stem, cambium originates from cells of pericycle.
c) Stamens of Gloriosa and Petunia are polyandrous.
d) Symbiotic nitrogen fixers also occur in free living state in soil.
How many of the above statements are correct?

One

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Two

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Three

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Four

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Solution

The correct option is B Two
Cambium grows from pericycle just outside the primary xylem, and also a part from procambium.
Symbiotic nitrogen fixers occur in free living state too in soil.
So, the correct option is B.

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Similar questions

Read the following four statements (A-D).

(A) Both photophosphorylation and oxidative phosphorylation involve the uphill transport of protons across the membrane.

(B) In dicot stems, a new cambium originates from the cells of the pericycle at the time of secondary growth.

(D) Symbiotic nitrogen fixers occur in a free-living state also in soil.

How many of the above statements are right?

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