STD 12 - 7. human health and disease — NEET STD 11 Science — Question

Movement of sperm is done by

When male ejaculates sperms during coitus of which for normal fertility at least....... percent sperms must have normal shape and size and at least ...........per cent of them must show vigorous motility

Broad palm with single palm crease is visible in a person suffering from-

In which of the following disorder gynaecomastia symptom is seen in individuals?

Which of the following animals maintain ecological balance?

Smack is generally taken by

Assertion: Ammonia, urea and uric acid are the major forms of nitrogenous wastes excreted by the animals.
Reason: Ammonia is the most toxic form and requires large amount of water for its elimination.

Cocaine is obtained from

The tendency of population to remain in genetic equilibrium may be disturbed by