The function of companion cells is:
A) to conduct food from one part of the plant to another
B) to aid the associated sieve tube members with its cellular activities.
C) to conduct water and minerals from one part of the plant to another.
D) to conduct food laterally.
E) to do all of the functions listed above.

Question

Quizplus · Accepted Answer

Companion cells are specialized cells found in the phloem of flowering plants. They are closely associated with sieve tube members and aid in their cellular activities, such as providing energy for active transport of sugars. While phloem does transport food (sugars), it does not transport water and minerals. Therefore, options A and C are incorrect. Option D is also incorrect as companion cells do not conduct food laterally, but rather longitudinally within the phloem. Option E is partially correct but Option B is the best because it specifically addresses the function of companion cells in aiding the associated sieve tube members.

The Function of Companion Cells Is