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प्रश्न
Which of the following does not lose their nucleus at maturity?
विकल्प
Companion cells
Red blood cells
Vessel
Sieve tube cells
उत्तर
Companion cells
Companion cells are narrow, elongated, thin-walled, living cells. They have dense cytoplasm and a prominent nucleus. Red blood cells of mammals, vessels (xylem elements), and sieve tube cells (phloem elements) lose their nuclei at maturity.
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