Biotechnology and its Applications — BIOLOGY STD 12 Science — Question

What is integrated organic farming? Mention its advantages.

Define analogous organ. Give one example of an organ analogous to human hand.

List the events that lead to biogas production from waste water whose BOD has been reduced significantly

In the North East region of India, during the process of jhum cultivation, forests are cleared by burning and left for regrowth after a year of cultivation. How would you explain the regrowth of forest in ecological term?

Name the embryonic stage that gets implanted in the uterine wall of a human female.

Explain mechanism of sex determination in birds.

Who proposed the theory of origin of life? What were the conditions prevailing about 3.6 billion years ago, to create life on primitive earth?

Which of the following are monoecious and dioecious organisms:
Chawra.

Which one gas is most abundant out of the four commonest greenhouse gases? Discuss the effect of this gas on the growth of plants.

Would you choose an exonuclease while producing a recombinant DNA molecule?