Lecture 27

Question 1

What is evolution?

Answer 1

Evolution is the change in populations of organisms over time.

Question 2

What is required for evolution?

Answer 2

variation, inheritance of genes from parents, selection pressures and time.

Question 3

What does similar DNA to another organism mean?

Answer 3

Similar DNA to another organism means the two organisms are closely related, the more similar the more closely related.

Question 4

What is artificial selection?

Answer 4

Selection pressures acting on species from humans for specific traits.

Question 5

Why is evolution not perfect?

Answer 5

Evolution can only do changes in steps, it can’t spontaneously produce new organisms. As such some traits produced by evolution will not be at maximum efficency.