A change in the amount of yolk and its distribution in the egg will affect
pattern of cleavage
number of blastomeres produced
fertilization
formation of zygote.
Which cavity arises by the invagination of endoderm and mesoderm
Which of the following structure is lacking from the placenta
The breakage of the membrane surrounding the acrosome in a mammalian sperm is
During pregnancy which one of the following is excreted?
$A$ : Oxytocin acts on the uterine muscles and cause stronger uterine contractions, which in turn stimulates further secretion of oxytocin.
$R$ : Oxytocin is released from maternal pituitary