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  3. Biology
  4. With regard to Sieve tube elements, consider the following statements: 1. A mature sieve element does not have cytoplasm 2. The nucleus and vacuole are absent in mature sieve element Which of the statement(s) given above is/are correct?

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Q. With regard to Sieve tube elements, consider the following statements:
1. A mature sieve element does not have cytoplasm
2. The nucleus and vacuole are absent in mature sieve element
Which of the statement(s) given above is/are correct?

Anatomy of Flowering Plants

Solution:

Sieve tube elements- Long, tube-like structures arranged longitudinally, associated with the companion cells. A mature sieve element possesses a peripheral cytoplasm and a large vacuole but lacks a nucleus. The functions of sieve tubes- controlled by the nucleus of companion cells. Companion cells maintain the pressure gradient in the sieve tubes.