Yolk of egg in the vertebrates is formed in
Massive amount of yolk present in the vegetal region of the egg, makes an egg
During embryonic development the establishment of polarity along anterior / posterior, dorsa l/ ventral or medial / lateral axis is called
Epiboly is the process of
$A$ : If both the ovaries are removed after the first trimester of pregnancy, still there would be normal growth of foetus.
$R$ : After first trimester placenta secretes sufficient progesterone