Unit 7 Test

Question 1

Who proposed theory of evolution?

Answer 1

Charles Darwin

Question 2

What is evolution

Answer 2

Descent with modifications through genetic inheritance

Question 3

What is a species

Answer 3

Organisms capable of interbreeding in nature and producing fertile offspring

Question 4

Individual

Answer 4

A single member of a species

Question 5

Population

Answer 5

A group of the same species in the same area

Question 6

What evolves?

Answer 6

Populations evolve and become new species. Individuals do NOT evolve

Question 7

Fossil record

Answer 7

Shows how species are similar

Question 8

Vestigial structures

Answer 8

Body part still present in modern organisms but has no function

Question 9

Homologous structures

Answer 9

Have different functions but are similar in structure (ex, wing, flipper, leg)

Question 10

Analogous structures

Answer 10

Similar functions that did not evolve from a common ancestor (ex, insect wings and bird wings)

Question 11

Embryonic development

Answer 11

Shared features in embryos of different species suggest common ancestors

Question 12

Direct evidence

Answer 12

Evolution of a species that can be witnessed in a humans lifetime (ex, bacterial resistance)

Question 13

What are Mrs Soltysiaks favorite flowers?

Answer 13

Sunflowers

Question 14

What is a variation

Answer 14

Individuals in a population that differ from one another

Question 15

What is Heritability

Answer 15

Variations that are inherited from parents, can be positive, negative or neutral

Question 16

Disruptive selection

Answer 16

Favors both extremes in a trait

Question 17

Stabilizing selection

Answer 17

Favors the median of a trait

Question 18

Directional selection

Answer 18

Only one extreme is favored

Question 19

Gene Pool

Answer 19

Collection of alleles found in the population

Question 20

Allele frequency

Answer 20

Proportion of one allele compared with the rest of the alleles

Question 21

Hardy-weinberg equilibrium

Answer 21

Phenotype frequencies change generation to generation, allele frequencies in a population stay the same because no evolutionary forces are acting on the population

Question 22

For a population NOT to evolve-

Answer 22

1. No mutations
2. Individuals mate randomly
3. Large population size
4. Individuals do not enter or leave population
5. Natural selection does not occur