Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Most commonly used vectors.

State the fate of a pair of auto-somes during gamete formation.

“Pranay suffered from measles at the age of 10 years. There are rare chances of his getting infected with the same disease for the rest of his life.” Give reason for the statement.

How do land plants absorb water and mineral salts from the soil?

Name the drugs obtained from hemp plant.

Following are the names of some microbes. Aspergillus niger, Clostridium butylicum and Lactobacillus.
Write the most important characteristic they share.

The microscopic pollen grains of the past are obtained as fossils. Mention the characteristic of the pollen grains that makes it happen.

List the three states the annual and biennial angiosperms have to pass through during their life cycle.

Name the protective substance present in the pollen envelope to tide over adverse conditions.

Give reason - 'Butter milk is used in the dough of dhokla'.