Mammalian eggs have
No yolk at all
Small amount of yolk
Large amount of yolk
Large amount of yolk concentrated at one pole
Which one of the following statements is incorrect about menstrual cycle?
The first sign of the growing foetus may be noticed by listening to the heart sound carefully through the stethoscope. Embryo's heart is formed _________.
Animal $\quad$ Gestation period
Enlarged end of penis (called the glans penis) is covered by the skin called
How many chromosome numbers are present in primary spermatocytes of human ?
An avian blastula is called