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Speciation & Evolution Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. Which of the following scenarios would qualify for Hardy-Weinberg equilibrium?

Question 2 2. If a phenotype is favored by mate choice, you would expect the allele frequency for that phenotype to _____.

Question 3 3. Which of the following is NOT an evolutionary agent that would move a population out of Hardy-Weinberg equilibrium?

Question 4 4. If a phenotype becomes unfavorable due to natural selection, you would expect the allele frequency for that phenotype to _____.

Question 5 5. A farmer mates a goat and a sheep together. However, he finds he cannot use this hybrid animal to produce any new hybrids. This is an example of _____.

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Question 6 6. A scientist mates two different organisms. She observes no offspring. A closer inspection reveals that the hybrid embryo does not develop properly. This is an example of _____.

Question 7 7. Which of the following statements is true?

Question 8 8. A postzygotic _____ is a mechanism that reduces the viability or reproductive capacity of hybrid offspring.

Question 9 9. Spatial isolation is the main reason why _____ do not mate.

Question 10 10. A zoo wants to assist two related endangered species with their reproduction and plans to directly implant the sperm into the female. Which type of isolation can NOT be overcome in this way?

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Question 11 11. One species of sea urchin is able to mate with another, but fertilization is rarely successful. What is this an example of?

Question 12 12. One way to overcome behavioral isolation that prevents animals from reproducing might be to _____.

Question 13 13. A situation in which two alleles of a gene are maintained in a population because heterozygotes are more fit than their homozygous counterparts is called:

Question 14 14. A scientist has observed animals in a particular habitat for some time. She notices that the slowest gazelles tend to fall victim to predators more frequently than faster ones. Over time, she notes that the gazelle herd on average runs faster. She is observing:

Question 15 15. A scientist has observed animals in a particular habitat for some time. She notices that in a population of birds those with either short or long beaks can find more food than those with average sized beaks. Over time, she notices a higher proportion of birds in the population have either short or long beaks. She is observing:

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Question 16 16. Which of the following forces is LEAST likely to cause a new species to arise in a population?

Question 17 17. A population of lizards is split by an earthquake which leaves half of the population on an island and the other half on the tip of the peninsula. These lizards can't swim. What type of speciation will occur?

Question 18 18. Which of the following statements about species is MOST accurate?

Question 19 19. Define speciation.

Question 20 20. Polyploidy has contributed to which of the following patterns of speciation?

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Question 21 21. Which of the following is an example of convergent evolution?

Question 22 22.

Which of the following is an example of a homologous structure or trait?

I. Arm bones of a human and wings of a bird

II. Wing of a penguin and wing of a mosquito

III. Beak of a penguin and beak of a duck

Question 23 23. A scientist notices several birds in the same area that are similar in appearance with the exception of different beak lengths. She observes that one type of bird with a particularly long beak can pick bugs out of holes in the ground, while the birds with shorter beaks cannot. The longer beak is an example of

Question 24 24. A new mutation allows a cheetah to run faster and hunt down more prey than its slower counterparts. This mutation increased the _____ of the cheetah.

Question 25 25. The study of the genetic variation within a population is known as:

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Question 26 26.

Which of the following is an example of natural selection?

I. Albino animals are rare in nature because they are easy for predators to find.

II. The fastest gazelle is least likely to be eaten by a lion.

III. The gorilla that is strong enough to become alpha male is the most likely to pass on his genes.

Question 27 27. Which of the following is NOT a principle of Darwin's theory of evolution?

Question 28 28. _____ can be defined as a change in a characteristic within a population over time.

Question 29 29. What is the Hardy-Weinberg equilibrium used to describe?

Question 30 30. A scientist mates a blue population of lizards with a red population of lizards. She observes that one out of ten hybrid offspring survive to adulthood compared to, roughly, eight out of ten blue or red lizards. This is an example of _____.

Speciation & Evolution Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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