Lesson 20: Evolution Unit Test Biology B Unit 1: Evolution

Evolution can be described as the changes which arise in the characteristics of a particular species over time. Evolution is favoured by natural selection. With time, those species which are better adapted to live in an environment are able to survive and pass on their characteristics to their offsprings. The theory of evolution by the means of natural selection was proposed by Charles Darwin which is generally accepted by the world.

1. a) derived character

2. adaptation

3. could be generalized to any population of organisms.

4. Mutations have arisen that may have altered allele frequencies.

5. a description of a trait or habitat.

6. c) birds and reptiles share a number of inherited characteristics

7. phenotype

8. Prokaryotes.

9. many possible genotypes, producing many possible phenotypes.

10. b) whether the mutation makes some lizards more fit for the environment that other lizards

11. genetic equilibrium

12. Geographic barriers

13. common ancestry.

14. radioactive dating

15. 1 nonrandommating;

 (2) small population size;

  (3) immigration or emigration;

  (4) Mutations;

  (5) Natural Select

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)