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习题练习:Unity and Diversity A.3 Origin of Cells



 作者: admin   总分: 11分  得分: _____________

答题人: 匿名未登录  开始时间: 23年07月31日 11:09  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What provides evidence that all life on Earth evolved from the s-a iy9y /ip9wmame population of cellp m9awy-i/y9i s?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Identify the correct row in the table regarding the formation of-nd +loxnf.34+ ((ezsnl zces vesicles.

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Whose experiments disproved spontaneous generati+gad, w /qtj)pon?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which type of isotopes are commonly us(w + zrpp/mh)ged in absolute dating of fossils?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following statements are reasons that RNA is believum f :()+ag1ybxzo0hz2f u w2oed to be the first uzog2f2 u )(mfyozxh0+ b:w1a genetic material?
I. RNA can form spontaneously when nucleotides are present
II. RNA contains ribose as its sugar
III. Miller demonstrated that organic molecules could be produced from a mixture of gases under conditions that simulated early Earth

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6#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
The diagram below shows the apeh-re -3*a ; zwdmf8ijparatus used in the experiments conducted by Miller aef3w-da jrie;h8m*z- nd Urey.


Describe how this experiment showed that the origin of life was possible on early Earth.
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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In the early 19th century, vitalism was a widely accepvt yu aoh+: gjz.;f09dted theory. This theory suggested that organic compounds u :; 0jzod.h+at9gyvf, those found in living organisms, could only be produced through a "vital force" present in living matter.

What was the role of urea in falsifying the theory of vitalism?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following is not evidence to support that the last universal eeisw-x5b ojy d*:1u8common ancestor (LUCA) could have emerged at hydrothermal*e:jboxw i-ud 1ey8s5 vents?

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9#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Researchers carried out a similar experiment to Louis Pasteurtep 2+4jloy-9w kl k)m’s famous experiment disproving spontaneous go+kplt9e2k )mj- w 4yleneration, using the set up below at 30°C.



1.Outline the theory of spontaneous generation.

2.1.State two variables that must be controlled in this experiment.

2.2.Explain why it is important to have controlled variables in this study.

3.1.State the letters of three flasks which would show signs of decomposition of broth.

3.2.Explain your answer to part (i).

4.Suggest, with reasons, how the results of the study would differ if the flasks were incubated at 4°C.
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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Louis Pasteur's famous experimen s;0miyrmfr d/3bw*b7k1 +au). awxgots disproving spontaneous generation were replicated by placing brodaxr /0y3wkrf u 7*mm o.g1swi)b+ab ;th into various flasks.

Which two flasks would show the presence of microorganisms in the results?

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11#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Below is a diagram of Euglen3- (y55-pqxx3+d+c ta3xhloq4drpmm3 ckdcg a a photosynthetic protist. It is a living cell which can carry out al+pdq x3rd+gmxk3la(d4 y3omhp c-c5-3 c5txq l the functions of life.

1.1.State which function of life the flagellum is adapted for.

1.2.State which function of life is enabled by the contractile vacuole.

2.Outline why viruses are not regarded as living organisms.

3.State two main principles of the cell theory

4.Explain how the properties of phospholipids mean they naturally form vesicles when in aqueous solution.

5.Explain how the formation of vesicles was important in the evolution of cells.
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