A) protogyny
B) protoandry
C) epigyny
D) hypogyny
Correct Answer: B
Solution :
Earthworms reproduce only sexually. These are bisexual (= hermaphrodite or monoecious) annelids. In spite of hermaphroditism, cross fertilization is the rule in earthworms. The maturation of sperms occurs much earliar than that of ova, ie, the earthworms are protandrous. So, self-fertilization cannot occur. The maturation of ova much earliar than sperms is known as protogyny.
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