Environmental Issues — BIOLOGY STD 12 Science — Question

Some of the microbes used as biofertilizers are prokaryotes. Name the taxonomic group they come under. With the help of an example, mention how they act as biofertilizers.

Briefly describe the aims and measures of reproductive and child healthcare programmes in India.OR
Mention the problems that are taken care of by Reproductive and Child Healthcare Programme.

The scientists believe that evolution is gradual. But extinction, part of evolutionary story, are 'sudden' and 'abrupt' and also group-specific. Comment whether a natural disaster can be the cause for extinction of species.

Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil?

Why is E. coli bacteria considered a suitable host for cloning?

Give the full form of ELISA. Which disease can be detected using it? Discuss the principle underlying the test.

Can you think of a situation where we deliberately want to make a species extinct? How would you justify it ?

Life originated from the earth's inorganic atmosphere in the past, but this no longer happens today. Give two reasons.

Restriction enzymes present in the cloning site of a vector should not have more than one recognition site. Comment.

What is a karyotype? How is it useful?