In eggs which have very thick and resistant membrane e.g., fishes and insects sperm penetrate through a special canal called
Vitelline membrane
Jelly coat
Polar body
Micropyle
Cryptorchidism is the condition in man when
Neoteny refers to
Uterine endometrium, epithelial glands and connective tissue are broken in menstrual phase. This is due to
Male accessory glands include
Which of the following is a set of male accessory ducts?