Answer:
Higher plants (angiosperms) and higher animals
(vertebrates) have a more complex structural organization as compared to the
lower groups of plants and animals. They have evolved very efficient mechanism
of sexual reproduction. These groups have resorted tore production by the
sexual method for the following reasons
(i) To ensure healthy progeny
(ii) To produce genetically
varied off springs that adapt to changes in environment and surviveal in all
climatic conditions.
(iii) It ensures the genetic
recombination those results in variation which gives rise to evolution.
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