SSS 2009-10-23
时间：2018-12-24 作者：英语课 分类：Scientific American(十)月
Some people eat to avoid being bored. Others to avoid doing something they’d rather not, like preparing a podcast. Now a report says we might eat to avoid fungi 1. Because warm-bloodedness, a condition that requires a lot of calories, may have evolved to keep fungal infections at bay.
There are obvious benefits to being warm blooded. Like not having to sit in the sun for a few hours just to get going in the morning. Another, less obvious plus, is the fact that we tend not to get attacked by fungi. Of the one-and-a-half million fungal species on Earth, only a few hundred are capable of infecting mammals. Compare that to a quarter of a million fungi that target plants, and 50,000 species that infect insects. So what makes us mammals relatively 2 fungus 3-free? It seems to be our hot bodies.
Scientists measured how well 4,000 different fungi fared at different temperatures. They found that nearly all grow well up to about 86 degrees. Beyond that, the survivors 4 drop by six percent for each extra degree. The study appears in the Journal of Infectious Diseases. Bottom line: if you can’t stand the fungus, get back in the kitchen.
- Students practice to apply the study of genetics to multicellular plants and fungi.学生们练习把基因学应用到多细胞植物和真菌中。
- The lawn was covered with fungi.草地上到处都是蘑菇。
- The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
- The operation was relatively painless.手术相对来说不痛。