1. a group of individuals that look similar and whose members are capable of producing fertile offspring.

2. Word species is derived from the Latin word meaning what?

3. the definition of species based on appearance as the major criterion for classifying an organism.

4. Define Morphology:

5. the definition of species based on reproductive success as the major criterion for classifying an organism.

6. organism that results from breeding 2 different species

7. Define Hybrid Vigor:

8. all of the members of a species that live in the same place at a given time.

9. graph that shows the standard variations of a trait within a population.

10. Define Genotype:

11. Define Phenotype:

12. segment of DNA that determines a specific trait.

13. Define Allele:

14. the collection of all of the genes for all of the traits in a population.

15. percentage of a specific allele for a gene in the gene pool.

16. Define Genetic Equilibrium:

17. What does the Hardy- Weinberg Principle state?

18. List the 5 conditions of the Hardy-Weinberg Principle:

19. any physical change in a gene or chromosome.

20. movement of individuals or alleles into or out of a population.

21. The movement of genes into or out of a population.

22. the phenomenon by which allele frequencies in a population change as a result of random events or chance.

23. Organisms with favorable variations survive and reproduce at a higher rate than those without the variation. – Survival of the Fittest.

24. type of Natural Selection in which individuals with the average form of a trait have an advantage over either of the extreme forms.

25. type of Natural Selection in which individuals with the one of the extreme forms of a trait have an advantage over both the other extreme form and the average form.

26. type of Natural Selection in which individuals with either of the extreme forms has an advantage over the average form.

27. The preferential choice of a mate based on the presence of a specific trait.

28. the most significant factor that disrupts genetic equilibrium and causes changes in the gene pool of a population. Such changes lead to Evolution.

29. Name the Scientist that studied land snails in the Bahamas and changed the grouping from 600 species to 2 species.

30. Define Speciation:

31. The physical separation of members of a population.

32. The inability of formerly interbreeding organisms to produce offspring.

33. List and describe the 2 theories on the rates of speciation.

34. Species with characteristics in between the ancestral form and the modern form.

35. All members of a species die.

36. Species become extinct due to what? Give 2 items.