Answer:
(c) Unicellular organisms, have
relatively simple organizations. So, the asexual mode of reproduction is common
in them. It is so because by asexual reproduction unicellular organisms can
multiply very fast. In Amoeba it occurs by binary fission and in yeast by budding
to be described first. In the sexual reproduction, both male and female gametes
have to fuse, while in asexual reproduction, ceil division takes place, Heterotrophic
organisms (humans, animals and decomposers) can reproduce either asexually or
sexually, e.g., in bacteria sexual reproduction occurs via conjugation and asexual
reproduction occurs via binary fission. Uninucleate organisms, like Ulva
(algae) reproduce asexually by zoospores and sexually by the fusion of gametes.
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