Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

What is the reason of shivering in malarial patient?

Why is X-chromosome called sex chromosome?

State one reason why breast feeding the baby acts as a natural contraceptive, for the mother?

How many bases will be there in three codons? How many amino acids will this number of bases code for?

Why hnRNA is required to undergo splicing?

Define adolescence.

The following statements (i), (ii) and (iii) seem to describe the water-pollinated submerged plants. Which one of these statements is incorrect?

1. The flowers do not produce nectar.
2. The pollen grains have mucilaginous covering.
3. The brightly-coloured female flowers have long stalks to reach the surface.

Give an example of an organism that enters diapause' and why.

Who was considered the sub-human and the primitive man?

The outer integument of the ovule develops into ______ after fertilisation.