• In Angiosperms and Vertebrates, sexual mode of reproduction is pronounced.
• Sexual mode of reproduction allows gradual changes in genetic pool, due to recombination.
• It allows the variation and helps the organism to adapt well according to the changing environment.
• In asexual reproduction, no variations are allowed exact copies of parents are produced. It leads to poor adaptability. Hence the organisms with such increased complexity, chose to reproduce sexually.
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