1 How many species of whales are there?2 What is the criterion to divide the main types of whales?3 What do whales use sounds for?4 Why do the campers take pictures of the whales' fins?5 Why do they contact othe
Corrigendum: How many species of mammals are there?doi:10.1093/jmammal/gyz052MAMMALOGYMAMMALSA correction is presented to the article "How many species of mammals are there?" which appeared in the previous issue.Journal of Mammalogy
How many species of ferns are there?Question:How many species of ferns are there?Ferns:Ferns are an ancient group of vascular plants that reproduce using spores rather than seeds. They are easily identified by their branch and leaf pattern called fronds.Answer...
Nowadays, there are many celebrities who are famous for their glamour and wealth rather than achievements and this sets a bad example for young people. To what extent do you agree or disagree? Give reasons for your answer and include any relevant examples from your own knowledge or experience....
()60. -How many species of animals do you think will be threatened with extinction when the surroundings around are damaged by mankind?-I expect quite a few. A. there being S B. there to be C. there have been D. there be 相关知识点: ...
Darwin thought that new species developed slowly, as populations of animals change over time-not individual animals, but groups of them, over hundreds of thousands of years.In every group of animals, there's always a little difference.Some grow bigger, some are faster, and some might have a...
How many different species of primates are there in the world?Question:How many different species of primates are there in the world?Species:In biology, a species is generally defined as a group of organisms that's capable of reproducing with one another to produce viable young. In tax...
7. not clearly known how many animal species are in the danger of dying out.( )A.They areB.What isC.There isD.It is
–Talk to your family, and ask if you could all try somevegetarianorvegan meals. There are loads of meat-free and plant-based recipes available online, or you can try ourveggie pasta bake! –Know where your food comes from! When you’re in the supermarket, ask a grown-up to help che...
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...