Which one of the following is the incorrect match of the events occurring during menstrual cycle?
Menstruation : Breakdown of endometrium and ovum not fertilised
Ovulation : $LH$ and $FSH$ attain peak level
Proliferative phase : Rapid regeneration of endometrium and maturation of Graafian follicle
Development of corpus luteum : Follicular phase and increased secretion of progesterone
Which of the following decidua layer forms a partition between developing embryo and lumen at uterus?
Which of the following cannot pass through the placenta into the foetus
In the diagram of section of Graafian follicle, different parts are indicated by alphabets; choose the answer in which these alphabets have been correctly matched with the parts they indicate........
$A$ : In frog gray cresent is formed during fertilization.
$R$ : It is because the black granules move towards the point of entry of the sperm in animal half
Eggs having yolk in their centre of cytoplasm in peripheral layer are called