ISC (Science) ISC Class 12 - CISCE Question Bank Solutions for Biology (Theory)

Give any four reasons for Mendel's success.

Give reasons for the following:

Testes descend into the scrotum before birth.

In the following questions/statements has four suggested answers. Rewrite the correct answer

Bt cotton is resistant to:

(A) Insects

(B) Herbicides

(C) Salt

(D) Drought

Describe the Miller and Urey experiment on the origin of life

Write short notes on Artificial measures to control population

Name a plant which flowers every twelve years.

Name the terminal stage of ageing in the life cycle of plants

Give a reason for the Following:

Pollen grains of wind-pollinated flowers are produced in large quantities.

Give a scientific term for the following:

The study of human population covering all aspects and parameters.

Explain the term biofortification. How is this technique useful for the production of ‘ golden rice? 

Define biogenesis.

Give the biological name of the following: 

Baker’s yeast

Give the biological name of the following: 

The microbe used to produce Swiss cheese.

Give the biological name of the following: 

A symbiotic nitrogen-fixing bacterium found in root nodules.

Explain the different types of endosperms in angiosperms. 

What is the difference between the teeth of apes and the teeth of man?

State two advantages of vegetative propagation.

List the advantages of biogas plants in rural areas.

Explain the steps involved in the process of plant breeding.

The maternal grandfather of a boy is colorblind, but his maternal grandmother is normal. The father of the boy is also normal. What is the probability of this boy being colorblind?