Need help with evolutionary test review questions?

Anonymous
timer Asked: Apr 25th, 2018

Question Description

Which of the following is a place that scientists look for evidence of evolution?

a.

The fossil remains of extinct animals.

b.

Examination of similar traits in closely related species.

c.

Change in gene frequencies across generations.

d.

Change in populations in the wild.

e.

All of the above.

What does h2 x S equal (where h is narrow-sense heritability and S is the strength of selection on the parental generation)?

A. the difference between the mean trait value of the offspring and the starting mean (population response to selection)

B. variation in additive genetics multiplied by average excess fitness

C. variation in phenotypic trait for the parental generation

D. the squared product of heterozygote frequency multiplied by the geographic area

Which feature evolved first?

A. synapsid-type skulls

B. photosynthesis

C. blowhole

D. nose

Complete dominance occurs when

a.

The phenotype of a heterozygote is identical to a type of homozygote.

b.

The genotype of a heterozygote is identical to the homozygote.

c.

The genotype of a heterozygote is not identical to the homozygote.

d.

None of the above.

What is the best course of action for a farmer who wants to slow the evolution of resistance of a pest population feeding on his crops?

a.

Allowing some nonresistant pests to survive.

b.

Decreasing the amount of pesticide, but increasing the concentration.

c.

Planting genetically modified crops that make their own pesticide.

d.

Nailing a toad to the barn door.

If most of the phenotypic variation for the trait in the population is due to environmental differences experienced by individuals

A. the heritability of the trait in a population is low

B. the population is small

C. there are only a few genes that encode for the trait

D. the population is large

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