When mammary glands of a male develop similar to that of a female,this condition is known as:

What is the oestrous cycle?

For what primary purpose is the call of the cuckoo heard during the rainy season?

Fertilisation of an egg cell means......
$(1)$ End of the process of oogenesis
$(2)$ Induces the completion of the second meiotic division
$(3)$ The corpus luteum degenerates
$(4)$ Signals for maintaining progesterone levels in the blood
$(5)$ Formation of a zygote

Rapid secretion of $LH$ in ovulation causes

The given figure shows a longitudinal section of the female reproductive system. Which three parts among $A-F$ are correctly identified?