How many insect species are in your country? The example of Trinidad and Tobagodoi:10.1080/00222933.2017.1339838StarrJournal of Natural History
discovered and described are in the realm of the very small: insects, bacteria and other microbes.“We’ve done a pretty good job of categorizing from the size of a fly up,” but anything below that is far less known, said Joel Cracraft of the American Museum of Natural History in New...
百度试题 结果1 题目How many species of plants ___ protected by law in this country? A. is B. are C. was D. were 相关知识点: 试题来源: 解析 B。“How many species of plants”是复数概念,且本句为一般现在时,故选 B。反馈 收藏 ...
So we muddle on, knowing that a species means different things to different people — which means, of course, that people will disagree on how many species of human have ever existed. It's also a question of what constitutes a human. To answer this question, it helps to understand the ...
Announced today by Census of Marine Life scientists, the figure is based on an innovative, validated analytical technique that dramatically narrows the range of previous estimates. Until now, the number of species on Earth was said to fall somewhere between 3 million and 100 million. ...
What's more, ants are an important food source for many animals. Ants are fascinating insects that play an important role in our world, but some of them are in danger. 50 A. They estimate(估计) there are 20 quadrillion ants on the planet. B. Ants are important for the environment. ...
How did the Earth get so manyspecies(物种)? For thousands ofyears, people wondered. In the 1840s,one naturalist had an idea. His namewas Charles Darwin. He spent his whole life studying animalsand insects (昆虫). Darwin thought that new species developedslowly, as populations of animals cha...
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...
My research group and my colleagues have been studying these small lizards called anoles that occur across the island of Puerto Rico. Now, most of the time, these lizards spend their time running up and down trees, chasing after insects, doing the things you know, that lizards do. But in...
百度试题 结果1 题目【题目】4. How many known species of fish are in the Amazon River?A.6400.B.3000.C.48. 相关知识点: 试题来源: 解析 【解析】B