Passage One Animal life first appeared on the earth about 400 million years ago. Through the passing millennia, thousands of animal species have come and gone. Until recently, this process was gradual, the result of changes in climate, in habitat, or in the genes of the animals themselves. ...
【题目】阅读理解Animal life first appeared on the earth about 400 million years ago. T hrough the passing millennia, thousands of animal species have come and gone. Until recently, this processwas gradual, the result of changes in climate,in habitat, or in the genes of the animals ...
Female Student: So, you mean, that's it. There's no way we can tell when life first appeared on earth. Professor: Well, there might be, let's think about this a minute.If no earlier rocks on earth could have survived with their fossil records intact.Is there anywhere else we could...
IT is unknown when life first appeared on Earth. The earliest known microfossils (˜3,500 Myr before present) are structurally complex, and if it is assumed that the associated organisms required a long time to develop this degree of complexity, then the existence of life much earlier than ...
不能,那哪天能见面? Will be able to meet tomorrow? Can't, which day that be able to meet?[translate] a保持我们教室清洁 Maintains our classroom to be clean[translate] aProduction Dispatching 生产派遣[translate] athe life on earth appeared out in space 生活在地球上出现于空间[translate]...
It puts the evidence out there for other people to consider,"said David Bottier, a paleobiologist at University of Southern California.Scientists believe life on Earth appeared 3.7 billion years ago. The earliest animals appeared much later but exactly when is still debated. The oldest undoubtedly...
A.the human body has changed compared with human first appeared on earth B.the way we live has changed a little C.our body can’t deal with the changes in life style D.the way we live today is proper for the human body 3.What is the main cause mentioned in the article why people...
Clifford, the Big Red Dog, first appeared 50 years ago, along with Emily Elizabeth, the little girl who loves him. Today we have Norman Bridwell, to talk with NPR's reporter on his dog's 50th birthday. So, Norman, tell us how it all started. Well, it was 1962 and I was struggling...
To answer the question regarding when the first cellular forms of life appeared on Earth, we can follow these steps:1. Identify the Type of Life: The question asks about the first cellular forms of life, which are known as prok
differentorganismsmusthaveappearedatdifferenttimes. 但是哪些是最先出现的呢为什么会显得如此多样的种类呢? Butwhichcamefirst,andwhyshouldtherebesuchanimmensevariety? 这种问题迷住了一个24岁的英国年轻人 Suchquestionsobsessedayoung24-year-oldEnglishman 他在1832年来到了这里 whocameherein1832. 他的名字叫查尔斯·达...