Give an account of lymphatic system of man

Give an account of bark.

Give an account of pheromones.

Give an account of Calvin's cycle.

Give an account of the nervous system in cockroach.

Give a brief account of mechanism of vision.

Give an account of the different types of symmetry in animals.

Give an account of ecological service for the benefit of mankind.

Give an account of various parts of a typical dicot leaf.

What is flower? Give an account of accessory whorls of flower. Flower is highly modified & condensed shoot specially designed for sexual reproduction.

Give an account of Down's syndrome.