The density of a population in a habitat | Class 12 Biology Chapter Organisms and Population, Organisms and Population NCERT Solutions

Transgenic animals are the animals in which a foreign gene is expressed. Such animals can be used to study the fundamental biological process, phenomenon as well as for producing products useful for mankind. Give one example for each type.

Why are blue green algae not popular as biofertilisers?

Give one example for each of the following:
i. Eurythermal plant species _______________
ii. A hot water spring organism _______________
iii. An organism seen in deep ocean trenches _______________
iv. An organism seen in compost pit _______________
v. A parasitic angiosperm _______________
vi. A stenothermal plant species _______________
vii. Soil organism _______________
viii. A benthic animal _______________
ix. Antifreeze compound seen in antarctic fish _______________
x. An organism which can conform _______________

What is hybrid vehicle technology?. Explain its advantages with a suitable example?

Why is it that the line of treatment for a genetic disease is different from infectious diseases?

How can we improve the success rate of fertilisation during artificial insemination in animal husbandry programmes?

The biodiversity increases when one moves from the pioneer to the climax stage. What could be the explanation?

Define Antigen and Antibody. Name any two diagnostic kits based upon them.

During the course of evolution why DNA was chosen over RNA as genetic material? Give reasons by first discussing the desired criteria in a molecule that can act as genetic material and in the light of biochemical differences between DNA and RNA.