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- 1) how can you use the data to better understand how the penguins capture prey? You may wish to find the average time it takes the penguin to capture each of the types of prey. You could organize the data into a table. 2) after data, analyze the data as described in question one1) Think back to the example of ovenbird evoluon in South America. Ovenbirds are a diverse family of small, insect-eang birds that live mainly in South America. Different ovenbird species have adapted to rocky ocean shorelines, snowy mountains, scorched deserts and tropical rainforests. Like finches, ovenbirds have a variety of beak sizes and shapes, an important indicator of food preference that makes them ideal for studying evoluon. In ovenbirds, "some [beaks] are long and down-curved, like a scythe, for probing into crevices in tree bark and others have short dagger-like bills." What conclusions did the researchers reach? A) ovenbirds are diverse because they do not share any common ancestors B) ovenbirds because successful because they are not native to the area and could easily colonize the area C) birds have different beaks that help them exploit different resources and avoid competition 2) One ant species from Africa is best at competing for space, but is worse at colonizing a…a. Which characteristic found in the prey species is most likely to be advantageous for survival? Why? What environmental factors might influence this? b. Which characteristic was the most successful for each of the predator and the prey populations? What was the selective pressure that allowed this characteristic to be successful? Remember that selective pressures are external factors, either environmental or from a different population. Predator Characteristic: Prey Characteristic: c. For both predator and prey populations, which characteristic was the least successful? What was the selective pressure? Predator Characteristic: Prey Characteristic:
- Interpret the following graphs: In the graphs, the number of days are 18.. 1 day is equal to 60 sec. For the first graph, days are taken on x-axis. The mean foraging times are taken on y-axis. For the 2nd graph, percentage of prey caught during first half of winter(1-6days) were taken on x-axis and percentage of prey caught during 2nd half of winter(7-12days) were taken on y-axis.5) According to the optimal foraging theory, which of the following is NOT one of the factors that influence the likelihood of a predator's selecting a prey type? Question 5 options: search time required to find alternative prey types profitability of the prey type handling time energy content probability of their own predation4 Use the drop-down menus to complete the statements about the birds. The changed environment selected For Against the birds with smaller beaks. The population of birds with smaller beaks increased decreased because of an increase decrease in competition over small seeds.
- You are observing two different species of caterpillars feeding on green shrubs in the Sacramento Mountains. One has bright red and yellow stripes, the other is a nondescript greenish color. You hypothesize that the two species have adopted different antipredation strategies. 1) What would these two strategies be called? 2) Which species would you predict is noxious to potential predators and which species is palatable? 3) Which species would you predict would alter its behavior more in the presence of predators? Why?All of the following factors can prevent predators from driving prey to extinction except: A. habitat complexity B. evolutionary changes in prey populations C. spatial refuges D. prey switching in predators E. simple environments allowing for easy predator dispersalDescribe the predation strategy (i.e., actively searching or ambush) of zebrafish under a well-lit environment.
- Use Verbal description of results from graph and then Interpret the graph for Foraging in Mixed Species Flocks sccenario in foraging lab. The interpretations must include Were the results expected and Did they support the hypotheses? If so, state the biological significance of the results from graph. If the results deviated significantly from expected results, discuss the hypotheses onthe basis of expected results and include an explanation of why this might be so. Lastly, state the conclusions drawn from the experiment and their biological relevance. Hypothesis: the assumption underscores the enhancement of foraging efficiency associated with the establishment of mixed-species flocks, emphasizing the advantages of cooperation and safety in numbers.Female parasitoid wasps search for insect hosts in which to lay eggs, and they can often discriminate among individual hosts that are more or less suitable for their offspring. Behavioral ecologists have asked whether or not the wasps’ willingness to lay eggs in less suitable hosts varies with the female’s age. On the basis of life history theory, what pattern of change would you predict? Does life history theory make any other predictions about animal behavior?Whichof the following factors can stabilize predator-prey relationships by providinga prey refuge?a.An area of prey habitat where predators cannot enterb.An area of prey habitat that is isolated and difficult for predators tofindc.The occurrence of prey in numbers too large for predators to attackeffectivelyd.The ability of prey to grow to a size invulnerable to predatione.All of the choices apply.