ALT
发表于 2025-3-23 13:37:02
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Monotonous
发表于 2025-3-23 17:37:45
ea water and so have a similar freezing point. Provided that they are not in prolonged contact with ice crystals, such animals are exposed to little risk of freezing whilst immersed in sea water. Even so, some antarctic and arctic amphipods maintain slightly heightened blood concentrations, which re
性别
发表于 2025-3-23 21:18:47
ar motion. The SI unit of temperature or temperature change is the Kelvin (K), now universally used in physics and chemistry. However, in the biological literature, where a relatively narrow temperature is important, there has been little movement towards use of the Kelvin (except for cryobiologists
乏味
发表于 2025-3-24 01:15:44
remarkable series of palaeontological discoveries by the Leakeys in Kenya and Tanzania tend to pinpoint the origin of man to tropical Africa, but the lower critical temperature of humans (LCT = 27°C resting in air; 33°C resting in water) is proof positive, since it is similar to that of tropical ani
Ancestor
发表于 2025-3-24 05:24:59
However, both endothermic and ectothermic animals often exhibit a range of behavioural responses which are effective in maintaining body temperature, or which allow animals to maintain exposure to cold conditions. Much convergent evolution of behaviour patterns has taken place and there are also no
采纳
发表于 2025-3-24 08:27:43
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Surgeon
发表于 2025-3-24 13:07:31
ng some particular need, but few end with such single purpose. Mrs. Mellanby‘s is no exception, for while the author planned this work to serve as a guide to the school pupil, which function it fulfils in an admirable way, it will also prove of value to the teacher, the university student and the am
骚动
发表于 2025-3-24 17:08:13
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戏服
发表于 2025-3-24 20:19:03
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opportune
发表于 2025-3-25 02:28:39
The motion of the robot was based on the swimming of live lampreys, which is described by an equation similar to that developed for the American eel by Tytell and Lauder (J Exp Biol 207:1825-1841, 2004). For steady swimming, the wake structure closely resembles that of the American eel, where two p