Describe the evolutionary change in the pattern of heart among the vertebrates.

Describe the post - fertilisation changes in a flower.

Mammals are most adapted among the vertebrates. Elaborate.

There has been an increase in the number of chambers in heart during evolution of vertebrates. Give the names of the class of vertebrates having two, three or four chambered heart.

Describe the changes occurring during synthesis phase.

Describe the simplest diffraction pattern.