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The cоllаred lizаrd is а species fоund in the Desert Sоuthwest. 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 explanation 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?
Use this experiment tо аnswer the questiоn belоw. Experiment Summаry: Effects of Light on Plаnt Growth Background:Plants require light to perform photosynthesis, the process by which they convert sunlight into chemical energy. Scientists hypothesize that the amount of light exposure affects the growth rate and health of plants. Objective:To investigate how different light conditions influence the growth of bean seedlings. Materials: Bean seeds (Phaseolus vulgaris) Planting pots with soil Water Ruler Light sources: full sunlight, partial light, and complete darkness Labels Procedure: Plant three groups of bean seeds in identical pots with soil. Each group contains five seeds. Place each group in different light conditions: Group A: Full sunlight Group B: Partial light (50% sunlight) Group C: Complete darkness Water all groups equally every day. Measure plant height every 2 days for 2 weeks. Record observations of leaf color, stem strength, and general plant health. Results: Group A (full sunlight) showed the highest growth rate, with strong stems and green leaves. Group B (partial light) grew slower, with slightly paler leaves. Group C (darkness) showed minimal growth, yellowing leaves, and weak stems. Conclusion:Plants exposed to more light exhibit higher growth rates and better overall health. Light is essential for photosynthesis, which supports plant growth. Q: If a student wanted to test the effect of fertilizer as well, which type of experimental design would be most appropriate?