Question

what happens if sexual reproduction is absent?​

Answer 1

Explanation:

Nostoc belongs to cyanophyceae. In this entire class sexual reproduction is completely absent. It reproduces by colony formation, hormogonia, akinetes, heterocysts and endospres. However genetic recombination has been observed. It may be probably through transformation or conjugation. The other three algae- Spirogyra, Ulothrix and Volvox belong to chlorophyceae. The members of this class show isogamous, anisogamous and oogamous type of sexual reproduction.

Answer 2

Deuteromycetes also known as 'Fungi Imperfecti', includes fungi such as Alternaria, Trichoderma, and Colletotrichum. While these are characterized by a well-developed, septate mycelium, some are siphonaceous and sexual reproduction is not known. However, asexual reproduction is through asexual spores or conidia or may even be lacking....

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