【英语时差8,16】生存策略（上）

Beneath the surface of a pond or stream it’s a fish-eat-fish world, and the tiny minnow is often lunch for larger fish such as pike. You’d think a tasty minnow would try to remain inconspicuous, but this isn’t always the case. If a minnow’s skin is damaged by an attacking pike, it releases a chemical that attracts more pike. Why would a minnow that’s already being attacked want to attract more trouble? Do injured minnows have some kind of crazy death wish? This seemingly suicidal behavior is actually a clever survival strategy. The minnow’s chemical has two distinct functions. First, it warns other minnows about the danger. Minnows travel in schools with close relatives, so this chemical alarm warns the others away from potentially dangerous waters. Even if the original minnow is eaten, its brothers and sisters will live to reproduce. From a genetic¹ standpoint, this self sacrifice makes sense.

 

1 genetic   

adj.遗传的，遗传学的

参考例句：

• It's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
• Each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。