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BIOS 105 Final Exam
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Please use this information to answer the following question.The collared lizard is a species found in the Desert Southwest. Male collared lizards show considerable color variation, ranging from brightly colored to a very dull pattern. Your goal is to determine the function, if any, of male color patterns in collared lizards, using the scientific method. Your tentative expla- nation is that male color plays a role in attracting females for mating purposes. You predict that females will preferentially choose brightly colored males over dull-colored ones. To test your prediction, you observed the interactions of female collared lizards with their male counterparts. You selected males that were the same age and size, and that differed only in their coloration pattern. You placed equal numbers of the two types of male lizards, bright and dull, in aquariums, along with one female lizard per aquarium. Out of 350 aquariums observed, the female chose to mate with the brightly colored male 277 times, and the dull-colored male 70 times. In three instances, the females did not mate with either type.Do the data support the conclusion that female collared lizards prefer more brightly colored
male lizards over dull-colored males?:
Answer Yes, this conclusion is supported by the data.
- The collared lizard is a species found in the Desert Southwest. Male collared lizards show
considerable color variation, ranging from brightly colored to a very dull pattern. Your goal is to determine the function, if any, of male color patterns in collared lizards, using the scientific method. Your tentative expla- nation is that male color plays a role in attracting females for mating purposes. You predict that females will preferentially choose brightly colored males over dull-colored ones. To test your prediction, you observed the interactions of female collared lizards with their male counterparts. You selected males that were the same age and size, and that differed only in their coloration pattern. You placed equal numbers of the two types of male lizards, bright and dull, in aquariums, along with one female lizard per aquarium. Out of 350 aquariums observed, the female chose to mate with the brightly colored male 277 times, and the dull-colored male 70 times. In three instances, the females did not mate with either type.
Dull-colored males were used in this experiment to .:
Answer serve as a comparison (control) group to the brightly colored males
- The collared lizard is a species found in the Desert Southwest. Male collared lizards show
considerable color variation, ranging from brightly colored to a 1 / 2
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very dull pattern. Your goal is to determine the function, if any, of male color patterns in collared lizards, using the scientific method. Your tentative expla- nation is that male color plays a role in attracting females for mating purposes. You predict that females will preferentially choose brightly colored males over dull-colored ones. To test your prediction, you observed the interactions of female collared lizards with their male counterparts. You selected males that were the same age and size, and that differed only in their coloration pattern. You placed equal numbers of the two types of male lizards, bright and dull, in aquariums, along with one female lizard per aquarium. Out of 350 aquariums observed, the female chose to mate with the brightly colored male 277 times, and the dull-colored male 70 times. In three instances, the females did not mate with either type.
What is the hypothesis of this case study?:
Answer A function of male coloration is to attract females.
4. How do hypotheses differ from theories?:
Answer Theories are more comprehensive than hypotheses.
5. Which function is NOT a property of life?:
Answer Populations of organisms rarely change over time.
- Suppose a scientist wanted to determine if a substance retrieved from outer space alive.
Which of these properties of the substance would NOT help her make that determination?:
Answer being multicolored.
7. What are the four most common elements found in living organisms?:
Answer car- bon, oxygen, nitrogen, and hydrogen
8. All atoms of an element have the same number of .:
Answer Protons
- The hydrogen and oxygen atoms of a water molecule are held together by
bonds.:
Answer covalent
10. Why is water considered a polar molecule?:
Answer The oxygen end of the molecule has a slight negative charge, and the hydrogen end
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