Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

What do you mean by trophic level and food chain?

How many primary follicles are left in each ovary at puberty?

Due to the jaw muscles of a person consuming Gutka becoming stiff, his jaw does not open properly. Name the possible disease.

What was the unique event in the history of universe?

Sex chromosome complement of a female bird is ______.

Eukaryotes do not have restriction endonuclease, then how they manage with normal endonuclease enzyme?

Describe an anticodon?

What is shield-shaped single cotyledon of monocots called?

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.

Using _______ vectors, nematode-specific genes are introduced into host plants.