Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

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.

Observe the relationship between first two words and suggest suitable word for the fourth one:

1. Ovary : Mesovarium :: Uterus: A.
2. Male : Penis :: Female : B.
3. Male gametes: Sperms:: Female gametes: C.

Which layer of microsporangial wall helps in the formation of sporopollenin?

What is Red Data Book?

Sketch and label – nervous system of Planari

How many base pairs are present in a nucleosome?

In yeast and Amoeba, the parent cell divides to give rise to two new individual cells. How does the cell division differ in these two organisms?

Name the following : Name the band of nerve fibres that connect cerebrum, cerebellum and spinal cord.

A material deposited on endodermis which forms barrier.

Give definition : Invasive species