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Question

Choose the correct option:
Some pteridophytes and
all seed plants


A

brought under flowering plants

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B

are heterosporous

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C

produce antheridia and archegonia on the same gametophyte

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D

exhibit a dominant gametophyte generation

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Solution

The correct option is B

are heterosporous


A heterosporous life history occurs in some pteridophytes and in all seed plants. It is characterized by morphologically dissimilar spores produced from two types of sporangia: microspores, or male spores, and megaspores (macrospores), or female spores in all seed plants. Since seed is produced by union of two different types of spores, the plant arising out of it will be heterosporous.


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