Text 6.2. Natural Selection

■ Essential targets:

By the end of this text you should be able to:

· explain what is meant by “ survival of the fittest”;

· distinguish between directional selection, stabilising selection, disruptive selection.

Pre-reading

■ With a partner consider the following questions and try to answer them. Then scan the text to check your answers.

1. What is natural selection?

2. What environmental factors effect on surviving and producing offspring?

■ Read the given text and make your essential assignments: