How many kinds of animals live on the Earth?A recent survey shows that scientists have found more than 2 million kinds of animals and there are over 10 million we haven't discovered yet.Animals are much more than food or pets for humans.Animals are smart.Some of them do very unusual thi...
Though taxonomists have been cataloguing plants and animals for more than 250 years, they still have no exact answer to the question, “How many species are on Earth?”“It’s a very simple question, but we have no simple answer,” Fisher said. One of the reasons we can’t get an...
C. Many animal species are dying out. D. Humans and animals are equal in terms of their population. 2. According to the passage, what leads to wildlife loss? ①creating farmland ②over-eating of mammals ③air pollution ④industrial over-fishing ...
Toad all over the street. There were dogs barking and fish floating on the water. There are horses that are scared and dont go into the pen, pigs that go into the pen and run out, chickens that are scared and fly into the trees. And there will be colorful clouds ...
7. How do migratory animals know where they're going? 7.迁徙动物如何知道它们要去哪里? 8. How many species are there on Earth? 8.地球上有多少物种? 9. How do organisms evolve? 9.有机体是如何进化的? 10. Why did dinosaurs grow to be so big?
Renewed interest in further exploration and taxonomy is required if this significant gap in our knowledge of life on Earth is to be closed. Citation: Mora C, Tittensor DP, Adl S, Simpson AGB, Worm B (2011) How Many Species Are There on Earth and in the Ocean? PLoS Biol 9(8): e...
根据第四段中的“These numbers suggest that fossils in general are rare, and that many species that were less widespread than T. rex were probably never preserved(这些数字表明,化石一般都很稀少,许多分布不如霸王龙的物种可能从未被保存下来)”可知,有些物种的化石可能永远不会被储存起来。故选D。 (4...
【全能解析】根据第四段中的“that many species thatwere less widespread than T. rex were probably neverpreserved”可知,比霸王龙分布范围小的物种可能从来没有生成化石而被保存下来。故选D。35.【答案】A【考点定位】标题概括题【全能解析】通读全文尤其是第一段最后一句“Thefgure has allowed researchers to...
Animals are our friends we should set up nature reserves to protect their advocacy for the Protection of Animals knowledge we all act together with us and the world that there is an animal Earth 动物是我们的朋友 我们应该去保护他们 建立自然保护区 宣传动物保护的知识 让大家一起行动起来 我们的世...
CEver wondered how many Tyrannosaurus rex(霸王龙) ever walked around the Earth? The answer is 2.5billion over the two million or so years in which the species existed, according to a calculation published today inScience. The figure has allowed researchers to estimate just how rare it is for...