Question

Question No. 17
Living plant cells with out nucleus are
(A) Mature sieve elements
(B) Tracheids
(C) Companion cells
(D) Phloem parenchyma
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Answer 1

Answer:

There are many parts of plant which do not contain nucleus:

Sclerenchymatous cells get deposited by lignin and lose nucleus & cytoplasm at maturity.

Xylem vessels consist of series of elongated dead cells for quick conduction of water and salts.

Sieve tubes which also conduct food, don't have nucleus in them.

Dead cork cells which replace the epidermis in woody plants.

So, the correct answer is 'Xylem vessels elements.'

Answer 2

Answer:

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