Question

The nucleus of the companion cells controls the functional activities of ________.

Answer 1

Sieve tubes:

1. Angiosperms and higher-level gymnosperms have sieve tubes as the main constituent cells of their phloem tissue system.
2. The plant's meristematic tissues gave way to these tissues as it grew.
3. The main components of phloem are two types of cells.
4. Sieve cells and companion cells are the terms used to describe them.
5. Companion cells are thin-walled parenchymatous cells that are located in the vicinity of sieve tubes.
6. They have prominent nuclei and thick cytoplasm.
7. Because sieve tube elements are devoid of a nucleus, the nuclei of partner cells control their metabolic activities.

Final Answer: The nucleus of the companion cells controls the functional activities of Sieve tubes.