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Question

Which of the following cells is not totipotent?

A
Pollen grain
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B
Sieve cell
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C
Epidermal cell
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D
Pith cell
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Solution

The correct option is A Sieve cell
Totipotent cells have the ability of regeneration. Sieve cells have a large central vacuole with thin peripheral protoplasm. There is complete absence of nucleus. Hence, they cannot regenerate.
Thus, the correct answer is option B.

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