Fusion of gametangia in Rhizopus is__________________.

Planogemetic copulation

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Gametangial contact

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Gametangial copulation

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Spermatogamy

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Solution

The correct option is B Gametangial copulation
Direct fusion of certain fungal gametangia without differentiation of the gametes is called gametangial copulation. Sexual reproduction is by gametangial copulation and complete fusion of protoplasts of two gametangia results in the formation of a zygospore. It is a characteristic feature of Zygomycetes.

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A multicelluar, filamentous alga exhibits a type of a sexual life cycle in which the meiotic division occurs after the formation of zygote. The ad adult filament of this alga has
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(b) Haploid vegetative cells and diploid gametangia
(c) Diploid vegetative cells and haploid gametangia
(d) Haploid vegetative cells and haploid gametangia

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