crown-of-thorns starfish populations托福阅读内容如下: Crown of Thorns Starfish and Coral Reefs The crown of thorns starfish, Acanthaster Tlanci, is large, twenty-five to thirty-five centimeters in diameter, and has seven to twenty-one arms that are covered in spines. It feeds primarily on cor...
Crown-of-thorns Starfish Populations A. planci, commonly known as the crown-the-of- starfish, is large sea star that lives in tropical zones of the Red Sea, the Indian Ocean, and the Pacific Ocean. Covered with long. sharp spines that contain a neurotoxin that causes a stinging sensation ...
after all, have been exploring marine environments only since the invention of diving gear during the Second World War. For all that today's marine biologists know, crown-of-thorns outbreaks may have occurred on reefs ever
Paragraph 1:The crown of thorns starfish, Acanthaster Tlanci, is large, twenty-five to thirty-five centimeters in diameter, and has seven to twenty-one arms that are covered in spines. It feeds primarily on coral and is found from the Indian Ocean to the west coast of Central America, us...
than on its predators or competitors. Alternatively, nitrogen and other nutrients may be boosting the plankton upon which starfish larvae feed. But this theory also has its weak points. Why, for instance, is the crown-of-thorns starfish the only reef resident experiencing such dramatic outbreaks?
C. Crown of thorns starfish normally live in high population densities. D. Crown of thorns starfish have caused a significant reduction in coral cover over large areas. 你的答案: 正确答案:C 题目解析: 登录 后才能查看题目解析,还没有账号? 马上注册 推荐文章: 【托福阅读】Official 45-P2 风媒传...
尖刺中含有一种神经毒素,这种神经毒素会给猎物带来刺痛感,平刺蛙以珊瑚虫为食,珊瑚虫是通过分泌碳酸钙来制造坚硬骨骼,最终形成珊瑚礁的动物。直到1962年首次在澳大利亚东北部海岸看到大量的A.planci,人们才认为它很罕见。然而,1962年后不久,在整个太平洋和印度洋的珊瑚礁上观察到了大量珊瑚。随着每一次人口爆炸,珊瑚...
托福阅读文章Crown of Thorns Starfish and Coral Reefs(刺冠海星和珊瑚礁)已经考了5次了。2017.11.18=2017.09.24=2017.06.10=2015.10.24=2011.01.08。本年度内应该不会再重复了,但是2018年可能还会再考!更多内容请关注我的新书:2018版《读出托福好英文》,2018年即将上架。 ...
题目:Crown of Thorns Starfish and Coral Reefs 内容回忆:写的是关于珊瑚礁的问题,分析海星对于珊瑚岛威胁。starfish可以对珊瑚礁造成很严重的伤害(有题),一只吃一大片珊瑚礁,但是对于starfish可以在珊瑚礁上大量繁殖的动机有很多说法,但是至今应该还没有确定。有自然环境的原因,暴风雨和人为原因。人类污染或炸药捕捞...
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