Biology Past Questions and Answers

The character that expresses itself in the presence of the contrasting characters

Which of the following animals exhibits territoriality?

(i) Draw and label the human sperm cell.
(ii) State where the sperm cell is produced and where it is stored.
(b) Explain how the structure of the sperm cell enables it to function
(c) Mention four advantages of sexual reproduction.

(a)(i) Draw and label.the mammalian heart.
(ii) Explain briefly pulmonary circulation in mammals.
(b) State five processes by which the mammalian body reduces its temperature.

(a) State eight human activities that may pollute water bodies
(b) Explain the measures that may be used to prevent pollution of water bodies.
(c) Mention four methods of purifying water.