Neoteny refers to
Development of gonads
Pre-adult animal
Metamorphosis
Retention of larval or embryonic trait in the adult body
Sperm enters from which part of egg?
In eggs which have very thick and resistant membrane e.g., fishes and insects sperm penetrate through a special canal called
Eggs of reptiles and birds are
In the egg of bird, shell and shell membranes are
Spermiogenesis or spermatiliosis is