Question

Nucleus is not present in-
(A) companion cell
(C) phloem parenchyma
(B) mature sieve tube
(D) collenchyma​

Answer 1

Answer:

Your answer is (C) Mature sieve tube

Companion cell , phloem parenchyma and collenchyma contain nucleus

But it is to be noted that immature sieve tube contains nucleus and as it matures the nucleus disdolves or disappears.

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Answer 2

Sieve tubes members do not have ribosomes or a nucleus and thus need companion cells to help them function as transport molecules.