Prepare a list of some animals that are found parasitic on human beings.

Dental formula in human beings is

Explain the evolution of human beings.

Given the dental formula of human beings

How many pairs of sex chromosomes are found in the somatic cells of the human being?

Give the proportion of protein and lipid in red blood cells of human beings.

Body cavity is the cavity present between body wall and gut wall. In some animals the body cavity is not lined by mesoderm. Such animals are called. (A) Acoelomate (B) Pseudocoelomate (C) Coelomate (D) Haemocoelomate