Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Name the hormonal composition of the oral contraceptive used by human females. Explain how does it act as a contraceptive.

Draw a well labelled diagram of an antibody molecule.

A vector is engineered with three features which facilitate its cloning within the host cell. List the three features and explain each one of them.

Fed up of a large family, a couple wanted to adopt a terminal method of contraception. Describe the process conducted by the doctor in either of the cases-male/ female partner.

A person recuperating from illness is advised to have curd regularly. Why?

Describe primary treatment of Sewage Treatment plant.###Explain Primary Treatment of sewage plant

Gene flow occurs through generations. Gene flow can occur across language barriers in humans. If we have a technique of measuring specific allele frequencies in different population of the world, can we not predict human migratory patterns in pre-history and history? Do you agree or disagree? Provide explanation to your answer.

Draw well labelled diagram of T.S. of Testis.

Is it true that there is more solar energy available in the tropics? Explain briefly.

Put these statements in the proper order, by rearranging the letters, to describe Darwin's theory of natural selection-

1. The end result of organic evolution is many different species, each adapted to specific environments.
2. Many more individuals are produced each generation that can survive and reproduce.
3. Gradually, over long periods of time, a population can become well adapted to a particular environment.
4. There are inheritable variation among the members of a population.
5. Individuals with adaptive characteristics are more likely to be selected to reproduce by the environment.