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MTLE Middle Level Science: Evolution of Life 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!

Page 1

Question 1 1. 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 2 2. Which of the following statements is true?

Question 3 3. Which of the following statements is true?

Question 4 4. Miller and Urey used all of the following substances to simulate Earth's early atmosphere EXCEPT _____.

Question 5 5. How old do most scientists think Earth is?

Page 2

Question 6 6. 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 7 7. Which is the largest terrestrial ecosystem found on Earth?

Question 8 8. _____ can be defined as a change in a characteristic within a population over time.

Question 9 9. Temperate grasslands and savannas are both grasslands, so how can you tell them apart?

Question 10 10. Which of the following is a biotic feature of an ecosystem?

Page 3

Question 11 11. 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?

Question 12 12. 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 13 13. Which of the following statements is true?

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

Page 4

Question 16 16. Which two factors are the most important in determining terrestrial biomes?

Question 17 17. Which of the following is an example of convergent evolution?

Question 18 18.

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 19 19. 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 20 20. Which of the following statements is true?

Page 5

Question 21 21. 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 22 22.

Which of the following is an example of analogous structures or traits?

I. Leg bones of a human and leg bones of a penguin

II. Wing of a penguin and wing of a mosquito

III. Beak of a penguin and beak of a duck

Question 23 23. One way to overcome behavioral isolation that prevents animals from reproducing might be to _____.

Question 24 24. 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 25 25. Which of the following theories best explains the mass extinction of the dinosaurs?

Page 6

Question 26 26. Which of the following is NOT a principle of Darwin's theory of evolution?

Question 27 27. 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?

Question 28 28. What is the purpose of the device shown?

Question 29 29. Which of the following statements is true?

Question 30 30. 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.

MTLE Middle Level Science: Evolution of Life 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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