Biology Past Questions and Answers

The statements below are about evolution of species<br/>I. Members of a species vary ll. Organisms produce many offspring lll. The mechanism of evolution is<br/>inheritance of acquired characters IV. Changes in the phenotype is brought about by the individual itself<br/>Which of the statement(s) is/are related to the Darwin’s theory of evolution?

Which of the following fields of study may not yield strong evidence of evolution?

(a) State two advantages of complex structural organisation in higher organisms.<br/>(b) (i) List two differences between colonial organisms and filamentous organisms.<br/>(ii) Give one example each of a colonial organisms and a eke filamentous<br/>(c) Make a labelled diagram 10 - 12 cm long to show the structure of a named filamentous alga. <br/>.

(a) Describe the process of osmo regulation in (I) a named unicellular organism (ii) man<br/>(b) Describe how the mammalian skin can react to regulate the body temperature in a hot room.

(a) What is meant by competition.<br/>(b) Explain briefly the terms: (i) interspecies competition: (ii) intra species competition.<br/>(c) Explain two ways each by which the toad/frog is structurally adapted to the following: (I) obtaining me food (ii) protection (iii) movement.