The first living things on Earth were single - celled organisms. Which of the following is a characteristic of the evolution from single - celled to multi - celled organisms? A. The ability to live independently without any cooperation among cells B. The development of specialized cells for ...
Whalesarethelargestlivingorganisms(生物)livingonthesurfaceoftheearth.Anadultbluewhaleweighsupto173tonswith30metersinlength.Whenawhalediesintheocean;itsbodyusuallyfallstotheseaflooranda"specialdeep-sea-ecosystemwillbeformedinalongtime.Scientistsgiveanametothis:thewhalefall. 米严毛其生形世 Recently,somescientist...
题目 BAfter Earth was formed, millions of years passed until the first living organismsappeared. Once-called organisms (11bacteria were the first life forms thatappeared in the water, then gradually,(12)(complex)organismsplants and animals-appeared. Fossils from the different geological eras prove(...
Whales are the largest living organisms (生物)living on the surface of the earth.An adult blue whale weighs up to 173 tonnes with 30 meters in length.When a whale dies in the ocean,its body usually falls to the sea floor and a special deep-sea ecosystem will be formed in a long time...
题目 The tightly-linked living organisms on the Earth's surface work as a self-regulating system, which can always counteract the unfavorable influence and maintain the environment intact. A.正确B.错误 相关知识点: 试题来源: 解析 B 反馈 收藏 ...
The longest living animals can survive for centuries and millennia, even pausing the aging process altogether. Here are the longest living animals in the world.
kinds of organisms(生物体) live on the Earth. For thousands of years, humans have searched for ways to organize this diversity. In the eighteenth century, a Swedish professor, physician, and naturalist named Carolus Linnaeus developed the system of naming and classifying organisms that we use ...
Life on Earth-Fresh Clues hint at how the first living organisms arose from inanimate matterRicardo, AlonsoSzostak, Jack WRicardo, A.; Szostak, J. W. Life on Earth: Fresh Clues Hint at How the First Living Organisms Arose from Inanimate Matter. Sci. Am. 2009, 301, 54-61....
Billions of years ago on the young planet Earth 数十亿年前,在年轻的地球上, simple organic compounds assembled into more complex coalitions 简单的有机化合物组合 成了更复杂的结合体, that could grow and reproduce. 能够成长及繁殖。 They were the very first life on Earth, 它们是地球上最早的生命...
Life on Earth uses about 25 of the 92 naturally occurring chemical elements, although just 4 of these elements—oxygen, carbon, hydrogen, and nitrogen—make up about 96 percent of the mass of living organisms. Thus, a first requirement for life might be the presence of most or all of the...