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Question

The arrangement of megaspores tetrad in a gymnosperm is

A
Decussate
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B
Tetrahedral
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C
Linear
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D
Isobilateral
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Solution

The correct option is D Linear
A fully developed archesporial cell becomes distinguishable deep down within the tissue by its large size and dense contents and functions as megaspore mother cell, which undergoes two divisions to form a linear tetrad, of four cells. Retention of the single functional and three abortive megaspores in the megasporangium occurs.
Thus, the correct answer is option C.

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