Evolution & Natural Selection for the MCAT: Tutoring Solution 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. Miller and Urey used all of the following substances to simulate Earth's early atmosphere EXCEPT _____.

Question 2 2. According to this graph, at which elevation is the population density of Species A the highest?

Question 3 3.

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 4 4. According to the cladogram shown, which organisms are most closely related?

Question 5 5.

Which of the following is an example of polyploidy?

I. An insect with n = 4 has 8 total chromosomes in each somatic cell

II. A plant with n = 12 has 48 total chromosomes in each somatic cell

III. A fish with n = 66 has 132 total chromosomes in each somatic cell

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Question 6 6. What is the purpose of the device shown?

Question 7 7. What is dispersion?

Question 8 8. Which of these large organisms has a type I survivorship curve?

Question 9 9. 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 10 10. If a mosquito feeds on a bird that is infected with the West Nile Virus and then feeds on a human being who then contracts the virus, what role is the mosquito playing in the infection of the person?

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Question 11 11. Small, non-living droplets that can regulate their internal environments are best known as _____

Question 12 12. 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:

Question 13 13. Which of the following is a density-independent factor that regulates population growth?

Question 14 14. An individual in a wheat population transforms from a diploid to a tetraploid genome. This individual gives rise to a new population of wheat which can no longer successfully mate with the original diploid population. This is an example of:

Question 15 15. 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 _____.

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Question 16 16. Scientists agree that Earth is about how old?

Question 17 17. According to the r/K selection theory, an r-selected species has which of the following characteristics?

Question 18 18. Which of the following forces is LEAST likely to cause a new species to arise in a population?

Question 19 19. The idea that the earth is constantly changing and, therefore, life on earth is continually evolving is:

Question 20 20. If a clade has a known common ancestor and displays all of its descendants, it is called:

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Question 21 21. Which of the following is a key feature of the life histories of species that have a type III survivorship curve?

Question 22 22. When a bee gathers nectar from a certain type of flower to make honey and in the process pollinates the flower, what kind of relationship exists between the bee and the flower?

Question 23 23. Which of the following is true about amensalism?

Question 24 24. Some studies have shown that a single copy of the cystic fibrosis disease allele can confer resistance to tuberculosis to a person. This is an example of:

Question 25 25. Scientists have found fossils that show a sudden appearance of a new organism after a period of no change. Which form of evolutionary change best explains this?

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Question 26 26. Which of the following statements about species is MOST accurate?

Question 27 27. On the Galapagos Islands, there are several species that are similar and resemble a common ancestor. Each island has a slightly different ecosystem. Which of the following best explains how these different species came to be?

Question 28 28. 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 _____.

Question 29 29. Which term best describes change over time?

Question 30 30. What scientist is credited with the idea that early life on Earth formed through a series of reactions that made simple compounds gradually more complex?

Evolution & Natural Selection for the MCAT: Tutoring Solution 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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