Why are vegetables cooked with difficulty at a hill station?

Cooking is difficult at high altitude.Why?

Why does boiling of an egg or cooking. of rice in an open vessel take more time at a hill station?

Indian agricultural institute, New Delhi developed vegetables with enriched vitamin and minerals. Write two examples of vitamin A, iron and calcium enriched vegetables.

There are some terms in connection with various power station given. Fill in the blanks suitably.

What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?

i) Why nematocysts are more concentrated on the oral end and tentacles of cnidarians? ii) What are the difficulties that coelenterate have to face if nematocysts were absent in body.

Arthropodes are organisms with chitinous exoskeleton. Suppose exoskeleton is absent in arthropods. List the difficulties arthropodes has to face.