BEHAVIORAL ECOLOGY STUDY Qs & KEY

BEHAVIORAL ECOLOGY STUDY Qs & KEY - BEHAVIORAL...

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BEHAVIORAL ECOLOGY QUESTIONS FROM OLD BIO 25 EXAMS MORE OR LESS RELEVANT FOR THIS TERM 1. Entamoeba invadens is a reptile gut bacteria. In about 30% of mitotic events, the cell fails to complete cytokinesis and the two daughter cells remain "stuck" together. When this happens, it is common for a different amoeba nearby to come to the aid of the "stuck" cells and physically force them apart, breaking their cytoplasmic link and completing cytokinesis. This phenomenon is known as "midwifing". a) Propose two (2) hypotheses for how this behavior might have evolved in Entamoeba invadens , drawing on the two major explanations for how altruism or cooperation is thought to evolve. State each hypothesize in the form "I hypothesize that cooperation in this species evolved by. .." or some other form of explicit hypothesis statement. Then, describe what kind of relationship must exist between the helper and helped individuals for the observed cooperation to have evolved in this manner. b) Which of your two hypotheses seems most likely in the case of a single-celled organism? Describe why you made the choice you did (you must choose one over the other). 2. In the sexually reproducing populations of a certain bird species, the males get very red heads during mating season.
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BEHAVIORAL ECOLOGY STUDY Qs & KEY - BEHAVIORAL...

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