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Q.

Selaginella and Salvinia  produce two kinds of spores, termed as heterospory which refers to the condition of 

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a

1 – mitospore, 1 – meiospore

b

2 kinds of spores produced from their respective mother cells by meiosis

c

2 kinds of mitospores

d

2 kinds of motile spores

answer is D.

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Detailed Solution

Selaginella and Salvinia are heterosporous as they produce two kinds of spores. Since pteridophytes have the diploid sporophyte as a dominant stage, the spores are produced by meiosis.

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