Describe briefly the four major groups of Protozoa.

Describe briefly the three physical properties of water which helps in ascent of water in xylem.

Describe briefly: (a) Arithmetic growth (b) Geometric growth (c) Sigmoid growth curve (d) Absolute and relative growth rates

Mention briefly about the circulatory system of earthworm

Mention briefly about the circulatory system of earthworm.

Discuss briefly the role of nucleolus in the cells actively involved in protein synthesis.