Structure of chromosome, cell cycle and cell division — Biology STD 10 — Question

Name the hormone responsible for the following function:
Regulates the functioning of the male and female reproductive organs

Name the Following :
The valve present between the chambers on the right side of the human heart.

Why urine is acidic while blood is alkaline?

Goiter is usually observed in people living in hilly regions.

Name the Following: The protein molecules which shows specificity against invading germs.

Define dark reaction.

Differentiate between:
Prostate gland and cowper’s gland (the nature of secretion)

Explain the term :
Crossing-over

Give appropriate term of the following:
The rupture of follicle and release of ovum from the ovary.

Give Reasons: Medical discoveries such as antibiotics and vaccinations have indirectly contributed to the sharp rise in human population in the present century.