Question

In gymnosperms sieve cells are associated with

• A. Albuminous cells
• B. Companion cells
• C. Guard cells
• D. Sieve plates

Answer 1

The correct option is A

Albuminous cells

The correct option is A:

Explanation of correct option:

1. The plants which do not have flowers i.e. non-flowering plants are called Gymnosperms.
2. The sieve cells are present in the phloem.
3. Phloem is a food conducting element present in plants.
4. Phloem in gymnosperms are composed of albuminous cells.

Explanation of incorrect option:

Option B:

1. Companion cells are thin-walled-shaped elongated cells that lie on the side of sieve tubes.
2. The nucleus of companion cells controls the metabolic activity of the sieve tubes.
3. In non-flowering plants companion cells are absent.

Option C:

1. Guard cells are present in the stomata which are present in the epidermis of leaves.
2. They regulated the closing and opening of stomata.

Option D:

1. Sieve plates are large pores present on the end walls of the sieve tubes.
2. Sieve tubes are associated with the companion cells.
3. And, they play role in food transport.

Final Answer: Hence, In gymnosperms sieve cells are associated with albuminous cells.