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BIOL 1001 Introduction to Biology Week 5 Exam

1. The phrase “survival of the fittest” is somewhat misleading because it implies that:
2. Choose the best answer. The logic of natural selection predicts that a population of organisms will undergo evolution if, and only if, which of the following condition(s) exist?
3. Your friend was diagnosed with strep throat 2 months ago. She was treated with antibiotics for 10 days, but 2 weeks after treatment, the symptoms returned. She was given a different antibiotic, and her symptoms again initially improved but then got worse. What is happening? Choose the best answer.
4. Which of the following occurs after the creation of a new allele?
5. A biologist has been studying two populations of trout in Montana for the last 25 years when the two populations were established from one common population. In the southern population, the fish now have a slightly different mouth shape. But the northern population hasn’t changed from the original type. The new shape works well in catching the type of prey common in the habitat of the southern population. Which explanation is the most likely explanation of the gene differences in the two populations?
6. A key prediction/implication of the evolutionary theory is that:
7. You notice that some squirrels in your neighborhood have a much darker coat color than most of the other squirrels. Is this darker color an adaptation?
8. Which of the following traits can be act on by natural selection?
9. In 1980, only 1% to 5% of all Staphylococcus aureus isolates were MRSA strains. Now 60% to 70% of S. aureus isolates are MRSA strains. This is an example of:
10. As natural selection acts on a population, the amount of variation in the population should:
11. Which of the following is not a way in which the theory of evolution has been supported?
12. Two unrelated individuals with the same color skin would:
13. In a population where most of the individuals have long, narrow noses, a child is born with a shorter, broader nose. What’s the most likely explanation for this variation?
14. Which individuals have the greatest fitness in an area where malaria is common?
15. A small founder population of turtles has established a population on an island with a varied and good habitat. There is very little competition between members. What is the likely effect on evolution of this low level of competition? The population will remain very stable in size, and it won’t evolve much.
16. What is an allele?
17. Which of the following describes natural selection?
18. Which of the following is true of individuals who are well adapt for a particular environment?
19. In what way is artificial selection different from natural selection?
20. What is the evolutionary origin of light skin in humans?
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