Question

Identify the correct pair of statements from the following.
I) Functions of sieve tubes are controlled by the nucleus of companion cells.
II) Albuminous cells are present in angiosperms.
III) In dicot root, the vascular cambium is completely secondary in origin.
IV) Cylindrical meristems contribute to the formation of primary plant body.

• A. I, III
• B. III, IV
• C. I, II
• D. II, III

Answer 1

The correct option is A I, III

Functions of sieve tubes are controlled by the nucleus of companion cells. Albuminous cells are physiologically and anatomically associated with a sieve cells in gymnosperm wood. In dicot root, the vascular cambium is completely secondary in origin. The meristem occurring in the mature regions of roots and shoots of many plants is known as the secondary or lateral meristem. They are cylindrical meristems.