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Unformatted text preview: BIOLOGY 150 – SAMPLE QUIZ QUESTIONS – LAB TOPIC A – Scientific Investigation and the Study of Life A researcher conducted an experiment on crows living in British Columbia. Near the coast, these birds often feed on clams found in tidal pools. A crow grabs a clam with its beak, then flies upward and drops the clam onto the rocks below to break the shell. If successful, the crow can dine on the clam’s inner soft parts. If the shell does not break, the crow flies up and drops the clam again and again until the shell breaks. The higher the bird flies, the fewer number of drops required to break the shell. Thus, a crow can either (1) drop the clam from lower height, but having to fly up more times, or (2) break the shell with fewer drops, but from higher up. Both options require lots of effort on the part of the crow. The researcher hypothesized that height and number of drops would influence feeding behavior in crows. He predicted that crows would, on average, fly to a middle (optimal) height requiring fewer drops than a lower height, but...
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- Fall '09
- Biology, Height, researcher, a. b. c., total effort