EEB100 Behavior Study Questions - Study Questions Behavior...

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Study Questions Behavior Questions with asterisks have answers in the accompanying key. 1. *For the following hypotheses, state whether they are proximate: sensory motor, proximate: genetic/developmental, ultimate: historical/phylogenetic, or ultimate: adaptive utility. a. Female lions synchronize fertile periods to create coalitions that can care for cubs cooperatively- U:AD b. The hormonal levels of subordinate female lions will rise and fall in response to hormonal levels in the dominant female over the course of breeding season- P:SM c. Ducklings can only undergo filial imprinting during the first two weeks after hatching- P:GD d. Search image formation increases the foraging efficiency of consumers- U:AU e. Human fear of snakes is innate- P:GD f. The complex mating song of lyrebirds signals the quality of their genes to females- U:AU g. Eusociality has evolved multiple times in the hymenopterans (bees, wasps, and ants)- U:HP h. Anolis lizards’ optic nerves are more sensitive to wavelengths of light that correspond to breeding colors than to other parts of the spectrum- P:SM 2. Infanticide by male hanuman langurs has been hypothesized to aid the langur group by reducing competition for resources. Explain why classic group selection hypotheses such as this are not, in general, compatible with natural selection. What alternative hypothesis for langur infanticide has evidence supporting it? - not group selection because if infanticide prevents overpopulation, this trait will be selected for - infanticide occurs when new male becomes dominant - Alt. Hypothesis: social pathology: population densities should correlate with behavior -Another one=males gain reproductive advantage by killing infants 3. Explain how noctuid moths sense and respond to bats. How does this demonstrate stimulus filtering? Noctuid moths sense bats through their A1 and A2 sensory receptors. They use one of these receptors depending on the intensity and pulse frequency of the bat ultrasound A2: very little fire under low speed, increases at higher A1: signals at low and just increases as you get louder, reacts every time Demonstrates stimulus filtering b/c after perception of the sound, other processes, the a1 or a2, determine the response Location of ears=thorax, the receptors respond to the bat cries, slow for normal and fast for attacking. When bat call is faster, send out a2 4. You observe that male birds emit calls in the 7kh range. On a graph show the generalized threshold response of the neurons of female birds to sound power, assuming they are not reacting to other sounds. Fire b/c stimulus of male bird call is at intensity threshold. It becomes tuned to specific stimuli, the axon transmits and signal transduction occursnerve impulse 5. *Below is a picture of a naked mole rat and its cortical map. If you examined the brain of a naked mole rat, which body parts would have the greatest amount of brain tissue devoted to their sensory inputs?
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