problem 1:

Inter-specific interactions of the two species of any population might be beneficial, detrimental or neutral. Describe each of them with the help of appropriate illustrations.

problem 2:

Water is very necessary for life. List any three characteristics which enable plants and animals to survive in the water scarce atmosphere.

problem 3:

What would be the effect of failure of the electrostatic precipitator of the thermal plant?
Illustrate any four methods by which the vehicular air pollution can be controlled.

problem 4:

a) Draw a labeled diagram of the sectional view of human ovary showing various phases of the oogenesis.

b) Where is morula formed in the humans? Describe the process of its development from zygote.

problem 5:

a) Draw a labeled diagram of the sectional view of the typical anatropous ovule.

b) Illustrate the fate of all the components of the embryo sac after the fertilization?