Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

If a regular dose of drug or alcohol is not provided to an addicted person, he shows some withdrawal symptoms. List any four such withdrawal symptoms.

Draw labelled diagrams of stable and declining age pyramids of human population.

How do surgical procedures prevent conception in humans? Explain the way it is achieved in human males.

Identify and explain steps ‘A’, ‘B’ and ‘C’ in the PCR diagram given below.

In the picture provided, what is the relationship between (1) and (2) with respect to population interaction and between (3) and (4) with respect to trophic levels.

(a) Write the full name of the diagnostic test conducted for AIDS. Explain the principle on which it works.
(b) Write the name of the type of genetic material found in the AIDS pathogen.

What is inbreeding depression? Why do the self-pollinated crops not show the ill effects of inbreeding depression?

What do you understand by bioethics or biopiracy?

Give a scientific term for the following sentences:

1. Total number of individuals of a species in an area.
2. A surgical procedure performed on males in which the vas deferens are cut and tied is known as:
3. A contraceptive device consisting of a small thimble-shaped cup that is placed over the uterus to prevent the entrance of spermatozoa.
4. Removal of gonads, often referring to the removal of male testes is called.