考研英語作文：細胞和溫度 Cells and Temperature
在學習、工作、生活中，許多人都寫過作文吧，通過作文可以把我們那些零零散散的思想，聚集在一塊。如何寫一篇有思想、有文采的.作文呢？以下是小編整理的考研英語作文：細胞和溫度 Cells and Temperature，歡迎閱讀，希望大家能夠喜歡。
cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. enzyme systems of mammals and birds are most efficient only within a narrow range around 37c;a departure of a few degrees from this value seriously impairs their functioning. even though cells can survive wider fluctuations the integrated actions of bodily systems are impaired. other animals have a wider tolerance for changes of bodily temperature.
for centuries it has been recognized that mammals and birds differ from other animals in the way they regulate body temperature. ways of characterizing the difference have become more accurate and meaningful over time, but popular terminology still reflects the old division into "warm-blooded" and "cold-blooded" species; warm-blooded included mammals and birds whereas all other creatures were considered cold-blooded. as more species were studied, it became evident that this classification was inadequate. a fence lizard or a desert iguana-each cold-blooded----usually has a body temperature only a degree or two below that of humans and so is not cold. therefore the net distinction was made between animals that maintain a constant body temperature, called home0therms, and those whose body temperature varies with their environments, called poikilotherms. but this classification also proved inadequate, because among mammals there are many that vary their body temperatures during hibernation. furthermore, many invertebrates that live in the depths of the ocean never eperience change in the depths of the ocean never eperience change in the chill of the deep water, and their body temperatures remain constant.
【考研英語作文：細胞和溫度 Cells and Temperature】相關文章：
考研英語（一）和英語（二）的題型和分值08-27
Transduced adult stem cells into in11-18
考研英語閱讀和作文的答題技巧10-07
我和鄉村公園考研英語作文08-22
考研英語一和英語二作文的區別12-29
考研英語寫作的難題和對策09-19
提煉考研英語的技巧和方法09-20
考研英語：語法的實詞和虛詞09-21
考研英語的內容和評分原則11-23
考研英語閱讀技巧和方法03-09