Which of the following taxa shows zooidogamous oogamy?
(I) Spirogyra (II) Funaria
(III) Pteris (IV) Cycas
The correct answer is

I, II, III

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I, III, IV

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I, II, IV

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II, III, IV

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Solution

The correct option is D II, III, IV
Zooidogamous oogamy is a form of sexual reproduction where one biflagellate antherozoid fuses with the egg produced by the archegonium to give rise to a zygote. This zygote is a sporophyte with a multicellular body and remains attached to the photosynthetic gametophyte for its nutrition. This is a characteristic feature of bryophytes, ferns and some gymnosperms such as Cycas and Ginkgo. Thus, the correct answer is option D.

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