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Question

Which among the following statement(s) is correct for haplodiplontic life cycle of plants?

A
Both haploid and diploid phases are equally dominant
B
It is exhibited by bryophytes and pteridophytes
C
Exhibited by some algae like Ectocarpus, Polysiphonia and Kelp
D
Dominant phases may differ between haploid gametophyte or diploid sporophyte
Solution
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Correct option is D. Exhibited by some algae like Ectocarpus, Polysiphonia and Kelp
Haplodiplontic life cycle is exhibited majorly by plants of Bryophyta and Pteridophyta but some algae like Ectocarpus, Polysiphoina and Kelp also show this type of life cycle. In haplodiplontic life cycle, the dominant phase may vary viz. a dominant haploid gametophyte will have short-lived multicellular sporophyte while a dominant diploid sporophyte will have short-lived gametophyte.
Hence, options 'A', 'C' and 'D' are correct.

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