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392:: Homeothermy might have evolved to facilitate sustained activity levels. Cold-blooded animals are often limited by external temperatures, which can affect their ability to hunt, escape predators, and carry out other essential activities. Homeothermy could have provided a selective advantage by allowing animals to be active for longer periods of time, increasing their chances of survival.
398:: The evolution of homeothermy could be linked to predator-prey dynamics. If predators were cold-blooded while their prey were warm-blooded, the predators might have struggled to hunt efficiently in cooler conditions. Homeothermy in prey species could have provided a competitive advantage by allowing them to maintain consistent performance across a wider range of temperatures.
380:: This hypothesis suggests that homeothermy evolved as a result of increased metabolic efficiency. Maintaining a consistent internal temperature allows for optimal enzyme activity and biochemical reactions. This efficiency could have provided an advantage in terms of sustained activity levels, improved foraging, and enhanced muscle function.
416:: Homeothermy could have originated as a response to the development of insulating structures like fur, feathers, or other coverings. As animals developed these insulating features, they would have been better equipped to maintain a stable internal temperature. Over time, this could have led to more advanced mechanisms for thermoregulation.
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have a relatively narrow temperature range at which their efficiencies are optimal. Temperatures outside this range can greatly reduce the rate of a reaction or stop it altogether. A creature with a fairly constant body temperature can therefore specialize in enzymes which are efficient at that
404:: Fluctuations in the Earth's climate over evolutionary timescales could have driven the development of homeothermy. Environments with unpredictable temperature changes might have favored animals that could regulate their body temperature internally, allowing them to adapt to varying conditions.
386:: This hypothesis proposes that homeothermy developed as a way to provide consistent and warm internal environments for developing embryos or young offspring. Endothermy could have enabled parents to keep their eggs or young warm, leading to improved survival rates and successful reproduction.
422:: Some researchers suggest that homeothermy might have evolved as animals migrated to higher altitudes where oxygen levels are lower. Homeothermy could have helped compensate for the reduced oxygen availability, ensuring efficient oxygen utilization and overall metabolic function.
410:: Homeothermy might have evolved in response to interactions with microorganisms, such as parasites and pathogens. Warm-blooded animals could have gained an advantage by creating an inhospitable environment for many disease-causing organisms, thus reducing the risk of infections.
434:: Homeothermy might have provided energetic advantages by allowing animals to exploit a wider range of ecological niches and food sources. Warm-blooded animals could have survived in habitats where cold-blooded competitors struggled due to temperature limitations.
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However, some environments offer much more consistent temperatures than others. For example, the tropics often have seasonal variations in temperature that are smaller than their diurnal variations. In addition, large bodies of water, such as the
325:, behavioral thermoregulation. Many reptiles use this strategy. For example, desert lizards are remarkable in that they maintain near-constant activity temperatures that are often within a degree or two of their lethal critical temperatures.
428:: Animals that migrated long distances would have encountered a wide range of temperature conditions. Homeothermy could have evolved as a way to maintain energy-efficient migration by reducing the need to frequently stop and warm up.
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These hypotheses are not mutually exclusive, and the evolution of homeothermy likely involved a combination of factors. The exact origin of homeothermy is still an area of active research and debate within the scientific community.
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must either operate well below optimum efficiency most of the time, migrate, hibernate or expend extra resources producing a wider range of enzymes to cover the wider range of body temperatures.
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Daniel, Roy M.; Peterson, Michelle E.; Danson, Michael J.; Price, Nicholas C.; Kelly, Sharon M.; Monk, Colin R.; Weinberg, Cristina S.; Oudshoorn, Matthew L.; Lee, Charles K. (2010-01-15).
314:. A poikilotherm is an organism that does not maintain a fixed internal temperature but rather its internal temperature fluctuates based on its environment and physical behaviour.
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The evolution of homeothermy is a complex topic with various hypotheses proposed to explain its origin. Here are the most common hypotheses:
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to these organisms. In cold weather the energy expenditure to maintain body temperature accelerates starvation and may lead to death.
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and then death. Additionally, homeothermy obtained from endothermy is a high energy strategy and many environments will offer lower
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Thermoregulation that maintains a stable internal body temperature regardless of external influence
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that maintains a stable internal body temperature regardless of external influence. This internal
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The group that includes mammals and birds, both "warm-blooded" homeothermic animals (in red) is
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Levesque, Danielle L.; Lovegrove, Barry G. (2014-05-01).
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617:"33.3C: Homeostasis - Thermoregulation"
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384:Endothermic Parental Care Hypothesis
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704:Journal of Experimental Biology
414:Insulation and Thermoregulation
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378:Metabolic Efficiency Hypothesis
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568:Ivanov, K.P. (2005).
369:Origin of homeothermy
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302:"similar" and θέρμη
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647:Biochemical Journal
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621:Biology LibreTexts
432:Energetic Benefits
426:Migratory Patterns
348:. You can help by
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195:Thermolabile
180:Heterothermy
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52:Please help
47:verification
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18:Homeothermic
477:hypothermia
319:endothermic
276:Homeothermy
175:Homeothermy
748:Categories
668:10289/3552
627:2021-01-30
602:2017-02-25
508:References
443:Advantages
280:homothermy
185:Stenotherm
138:in animals
80:newspapers
726:0022-0949
677:0264-6021
547:0003-0147
329:Evolution
190:Eurytherm
165:Mesotherm
160:Endotherm
155:Ectotherm
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685:19849667
555:84070652
491:See also
448:Enzymes
300:homoios
298:ὅμοιος
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101:JSTOR
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