Spiral cleavage is found in
Synapta
Amphibia
Nematoda, annelida and rotifera etc.
None of the above
The main function of tropho ectoderm in mammalian embryo is
In rabbit, head of the epididymis present at the head of the testis is called
Egg of rabbit and man are
In man sperms move after ejaculation at a rate of nearly
Heterogametic male condition does not occur in