Which of the following doesn't lose their nucleus at maturity ?
a) companion cells b) RBCs c) vessel d) sieve tube cells

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Solution

Companion cells are the ones which do not loose their nucleus at maturity. RBC's, vessels and sieve tube cells loose their nucleus at maturity.

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Q. Question 23
Which of the following does not lose their nucleus at maturity?

(a) Companion cells
(b) Red blood cells
(c) Vessel
(d) Sieve tube cells

Question 23
Which of the following do not lose their nucleus at maturity?

(a) Companion cells
(b) Red blood cells
(c) Vessel
(d) Sieve tube cells

Which one of the following has cytoplasm but no nucleus : (a) xylem vessel
(b) sieve tube
(c) tracheid
(d) companion cell

Question 4
Which cell does not have perforated cell wall?

(a) Tracheids
(b) Companion cells
(c) Sieve tubes
(d) Vessels

Both phloem sieve tube cells and xylem vessel cells are derived from same kind of precursor cells but at maturity they are different. What feature is unique to phloem sieve tube cells?

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Which of the following doesn't lose their nucleus at maturity ? a) companion cells b) RBCs c) vessel d) sieve tube cells

Companion cells are the ones which do not loose their nucleus at maturity. RBC's, vessels and sieve tube cells loose their nucleus at maturity.

Which of the following doesn't lose their nucleus at maturity ?
a) companion cells b) RBCs c) vessel d) sieve tube cells