Chorion is composed of
Cytotrophoderm
Syncytial trophoblast
Outer ectoderm and somatic mesoderm
All the above
Egg of rabbit and man are
Meroblastic cleavage refers to which type of division of egg
Given below is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts labelled $A, B, C, D.$
Enlarged end of penis (called the glans penis) is covered by the skin called
How does zona pellucida of ovum help in preventing polyspermy ?