6.How does gene flow directly contribute to evolution? Gene flow contributes evolution by
A introducing new alleles to the population
B. reducing the number of members in a population
C. changing the environment in which a population resides
D. increasing the allele frequency of the dominant trait in population

7.A population of birds lives on an island. The smaller beaks birds eat smaller seeds while the larger beaks eat large seeds. A fungus destroys the plants that make large seeds, leaving only the small seeds as food. Which type of natural selection will most likely occur?
A. artificial
B directional
C disruptive
D. stabilizing

8. What category of natural selection is being described when the environment
favors extreme types in a population at the expense of intermediate type?
A. artificial
B. directional
C. disruptive
D. stabilizing

9. What genetic mechanism occurs when there is a decrease in genetic variation caused by a drastic reduction in population size?
A. founder effect
C. polymorphic effect
B. bottleneck effect
D. Hardy-Weinberg effect

10. In a population of wildflowers, the frequency of the dominant allele for red
flowers is 0.7. What is the frequency of the recessive white allele?
A.0.1
B. O.3
C.0.6
D.0.9

11. Referring to question 10, what is the frequency of homozygous red flowering
plants in the population?
A. 0.39
B.0.49
C.0.59
D. 0.69

12.Which combination of characteristics in a population would provide the greatest potential for evolutionary change? Evolutionary change
occurs in population with mutations.
A. small; few
B. large: few
C.small;many
D. large; many

13. In a study of a population of field mice, you find that 48% of the mice have a coat color that indicates that they are heterozygous for a particular gene. What would be the frequency of the dominant allele in this population?
A. 0.46
B. 0.48
C. 0.50
D.0.52

14 What mechanism plays an important role in the evolutionary change in human populations?
A. mutation
B. gene flow
C. genetic drift
D. natural selection