The puma or mountain lion, Puma concolor, ranges from the Canadian Yukon to the tip of South America. Body size of mammals also correlates well with latitude (Bergmann’s rule); the larger pumas live at high latitudes. Consequently, this variation in body size has been interpreted as the result of selection for efficient temperature regulation. Why are homeothermic animals often larger at high latitudes?

The puma or mountain lion, Puma concolor, ranges from the Canadian Yukon to the tip of South America. Body size of mammals also correlates well with latitude (Bergmann’s rule); the larger pumas live at high latitudes. Consequently, this variation in body size has been interpreted as the result of selection for efficient temperature regulation. Why are homeothermic animals often larger at high latitudes?

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter37: Maintaining The Internal Environment

Section: Chapter Questions

Problem 3CT

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The range of regulated body temperatures in mammals is about 36 to 40°C , while in birds it is slightly higher, 38 to 42°C, close to the limit compatible with life. Why do you imagine birds maintain higher body temperatures thanmammals? Do you think eagles and hummingbirds maintain the same body temperatures? Explain.
A desert beetle in northern Mexico can change its behavior to regulate its body temperature above 35c. When would being in a burrow not be the best option for cooling off?
The Mojave Desert of the western United States is characterized by a hot, dry climate. Scientists predict that temperatures in this region will increase by an average of 4.7° F over the next 30 years. Birds found here (like ground-dwelling roadrunners) are endotherms and have many adaptations to reduce the amount of heat absorbed into the body while active in the daytime. If temperatures increase in this area as predicted, how might the plumage (the feathers covering the body) of these roadrunners change under the influence of natural selection? 1:The plumage will likely become longer and increase heat absorption into the body. 2:The plumage will likely become darker and increase heat absorbed from the environment. 3:The plumaqe will likely become lighter and increase heat reflected away from the body. 4:The plumage will likely become thicker and increase the amount of heat trapped by the body.
Why is it essential for organisms to maintain a relatively constant body temperature? Describe adaptations that help the organisms cope with changes in environmental temperature.
Which example below is a positive feedback relevant to Earth’s global energy balance? a. Increased temperature causes snow to melt. This exposes bare ground, which absorbs more solar radiation than snow, leading to further increases in temperature. b. Increased temperature causes snow to melt, which allows increased vegetation to remove CO2 from the atmosphere thereby reducing temperature. c. Increased temperature causes more solar radiation to enter the atmosphere thereby further increasing temperature. d. Increased CO2 causes the oceans to become more acidic which causes oceanic volcanoes to erupt releasing more CO2 into the environment. e. Burning fossil fuels releases CO2, which traps long-wave radiation causing temperatures to increase.
Thetiger beetle Cicindela longilabris inhabits higher latitudes and elevationsthan other North American tiger beetles; Schultz, Quinlan, and Hadley concludedthat all of the following factors contributed to these cooler environmentalpreferences, except:a.higher metabolic rates.b.lower body temperatures.c.increased water proofing.d.both higher metabolic rates and lower body temperatures.e.both higher metabolic rates and increased water proofing.
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Can you please do the conclusion Hypothesis if there’s an external temperature change then the body will respond to maintain homeostasis.
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A desert beetle’s use of microclimates changes with seasons by temperature. In extremely hot summers, the beetle would need to seek a place that is cooler to regulate its body temperature to prevent overheating. In this season, it would go into underground burrows to avoid the heat above ground. This keeps them cooler during the day. In the evening, beetles lie on the ground to absorb the heat from the daytime to keep warm. This way the beetle regulates its body temperature both a night and during the day. In the cooler season, beetles shade themselves from the sun with the use of shrubs. The shade is efficient enough during that season to maintain their body temperature. If the beetle were to burrow in the cooler season, its body temperature would become too cold. During the winter, the beetle would occupy the ground to receive warmth from the sun. The worst time to be in a burrow would probably be during the cooler season or the winter. The beetle would get too cold if it went in…
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