The mammalian primitive streak gives rise to
Ectoderm
Mesoderm
Endoderm
Germ layers
After implantation, finger-like projections on the trophoblast are called $...A....$ which are surrounded by $...B..$ and maternal blood. Here $A$ and $B$ refers to
Which mammals have more yolk than cytoplasm in their eggs
Prostate gland surrounds the $...A....$ It produces milky, slightly alkaline solution which forms $...B..$ volume of the semen. The secretion contains $...C...$ acid and enzymes (acid phosphates, amylase pepsinogen and prostaglandins). $A$, $B$ and $C$ in the above statement is
$A$ : The male urethra is longer than the female urethra.
$R$ : It carries both urine as well as semen.
Endometrium is lining of