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Natural Selection

Test Description: Second review

Instructions: Answer all questions to get your test result.

1) Some features in organisms can be compared to spandrels in architecture in that, although they appear to have a function, they are really just there because of the evolution of other structures. This analogy is used as an argument for care in identi

Ahomologous structures in organisms Bvestigial structure in organisms Ctraits as adaptations Dnatural selection

2) In humans, the pelvis and femur, or thigh bone, are involved in walking. In whales, the pelvis and femur shown in Figure 15-1 are

Aexamples of fossils Bexamples of natural variation Cvestigial structures Daquired traits

3) How do fossils demonstrate evidence of evolution?

AThey show that ancient species share similarities with species now on Earth BThey show evidence of species that are now extinct. CThey are the primary source of evidence of natural selection. DFossils reveal that many species have remained unchanged for millions of years.

4) On the islands of Hawaii there are a group of about 30 species of highly variable, but closely related, species of plants called silverswords. These species appear to be related to a small group of plants in North America. What are the silverswords

Aadaptive radiation Banalogous structures Cmimicry Dvestigial structures

5) An adaptation is an inherited characteristic that can be

Aacquired during the organism's lifetime Bphysical or behavioral Cphysical or geographical Dthe result of artifical selection

6) When allelic frequencies remain unchanged, a population is in genetic equilibrium. This statement expresses which of the following?

Asympatric speciation Bgenetic drift CHardy-Weinberg principle Dprezygotic isolating mechanism

7) Which of the following is NOT a factor that causes changes in the frequency of homozygous and heterozygous individuals in a population?

Amutations Bgenetic drift Crandom mating Dmigration

8) Which of the following lines of evidence for evolution is indirect?

Aobserved allele frequency changes Bfossils Cpesticide resistance Dall of these

9) To be in Hardy-Weinberg equilibrium, a population must be

Avery small, have random mating, no geneflow, no natural selection Bvery large, have random mating, no geneflow, no mutations, no natural selection Cvery small, have nonrandom mating, no geneflow, many mutations, no natural selection Dvery large, have random mating, high geneflow, many mutations, natural selection

10) Mutations in the DNA of genes that can be passed on to offspring

Aresult in increased genetic variation Bare always harmful to the offspring Care more likely with genetic drift Ddo not occur randomly during evolution.

*select an answer for all questions

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