How Many Species of Insects and Other Terrestrial Arthropods Are There on Earth? 来自 NCBI 喜欢 0 阅读量: 496 作者:Stork,E Nigel 摘要: In the last decade, new methods of estimating global species richness have been developed and existing ones improved through the use of more appropriate ...
It is a natural process of animal species to become extinct (e.g. dinosaurs, dodos etc.). There is no reason why people should try to stop this from happening. Do you agree or disagree? Give reasons for your answer and include any relevant examples from your own knowledge or experience....
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正确答案:C 解析:本题的关键是数字信息的听辨和记录。根据原文“Around 380 million years ago,only 300 species groups were left in existence”,可以判断C是正确选项。 知识模块:句子听辨 听力原文:During the past 1. 65 million years, there have been four major episodes of global cooling, which resulte...
解答 答案:D.根据真正主语how many animal species are in the danger of dying out可见空白处应为形式主语,纵观选项,唯有it可担当形式主语,故选D.注意区分主语从句B选项what…is 从句,就对了. 点评 本题考查it 形式主语,结合语义的基础上便能选出正确答案,同时要注意与主语从句不要混淆.练习...
“Species aren’t equally distributed across the Earth; they have these hotspots,” Fisher said. For example, says AMNH entomologist Randall Schuh, as of 2003 there are about 2,000 known plant-eating bug species in North America, but only 200 in Australia, while the sampling of Australia’...
There are approximately 36 dolphin species known to humans today, found in fresh and saltwater environments across the planet Earth. Dolphins are a member of the marine mammal group known as cetaceans, which also contain whales and porpoises. Because of the many similarities between dolphins, whales...
Biodiversity(生物多样性), or biological diversity, is a wide-ranging concept that covers all the different kinds of plant and animal species present on earth. Environmentalists believe that many millions of species exist. As all these living organisms are dependent on each ot...
After all, it is likely their religious veneration of cats that has caused all domesticated house cats today to have that sassy and entitled attitude that they are both loved and hated for! Related Reads: How Many Cats Are There On the Planet? What Stats Says Domestic Medium Hair Cat: ...
Grassle and Maciolek (1992) estimated that there were of the order of 107 species of benthic macro-invertebrates in the world's deep sea soft sediments. Their estimate was extrapolated from the 798 species they sampled and the pattern of species diversity observed along a 176km transect on the...