Human Reproduction — BIOLOGY STD 12 Science — Question

Define : Population

Mark the odd one in give each of the following groups.
Carboniferous, Triassic, Devonian, Permian.

Write a difference between net primary productivity and gross primary productivity.

OR

How is net primary productivity different from gross primary productivity?

An antibiotic called wonder drug was used to treat the wounded soldiers of America during World War II. Name the drug and scientist, who discovered it.

Clot formation can be prevented by treatment with_______ in gene therapy:

1. DNAase
2. Recombinant vaccine
3. TPA
4. TGF-B

A Volcano erupted in Hawaii, and lava covered land that had been framed for centuries. Eventually, new lichens, and then plants, grew on the lava. Is this an example of primary or secondary successions? Give the reason also.

'Cry’ 'protein’ coded by gene Cry IAb controls:

1. Cotton bollworm.
2. Corn borer.
3. Tobacco budworm.
4. Mosquito.

Who proposed the nucleosome mode!? State the function of rRNA.

What do you means by splicing.

What is stratification in an ecosystem? Explain with an example.