…… is the vital link that ensures continuity of species between organisms of one generation and the next generation

Which organism do not have heterogametes?

Select the incorrect pair :

Archegoniophore and antheridiophore are part of reproductive organ of………

Which of the following statements are correct regarding female reproductive cycle?

$A$. In non-primate mammals cyclical changes during reproduction are called oestrus cycle.

$B$. First menstrual cycle begins at puberty and is called menopause.

$C$. Lack of menstruation may be indicative of pregnancy.

$D$. Cyclic menstruation extends between menarche and menopause.

Choose the most appropriate answer from the options given below.