Organisms and Populations — BIOLOGY STD 12 Science — Question

Why is a food web formed in nature?

Name the interaction in the following:
Ascaris worms living in the intestine of humans.

Write the names of any two autosomal genetic disorders.

Before integrating DNA with bacterial plasmid, bacterial cells are treated with calcium. Why?

Name the antibiotic used extensively to treat the soldiers wounded in world war II.

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.

What do you mean by the term eurythermal?

What is biofertilizer and write two example.

Write one method of introducing foreign DNA into host cells.

What is activated sludge.