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Companion cells are closely associated with :
Options
(a) Sieve elements
(b) Vessel elements
(c) Trichomes
(d) Guard cells
Correct Answer:
Sieve elements
Explanation:
Companion cells are narrow, elongated and thin walled living cells. They lie on the sides of the sieve tubes and are closely associated with them through compound plasmodesmata. It is supposed that the nuclei of the companion cells control the activities of the sieve tube through plasmodesmata. Companion cells also help in maintaining a proper pressure gradient in the sieve tube elements
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Question Type: Memory
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Difficulty Level: Easy
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Topics: Structural Organisation In Plants
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Subject: Biology
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The correct floral formula of chilli is
- Select the Taxon mentioned that represents both marine and fresh water species :
- Which of the following is not true for a species?
- In anaerobic respiration the pyruvic acid in muscle will form
- Recombinant DNA or rDNA technology was discovered by
Question Type: Memory (964)
Difficulty Level: Easy (1008)
Topics: Structural Organisation In Plants (243)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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