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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 onpl a3apd* 6w vit)o,7b Earth evolved from the same population o)7a6 dp3o*lv aipbw,tf cells?

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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 formal (w6/nformmp:,xw8lwe psq 5 .z un/+tion of vesicles.

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Whose experiments disprovez9z4 *;4d/mczak jtfsd spontaneous generation?

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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 used in absolute dating of ,q5y79 e hn5/ub*tsf( d+tu ovgfqf:r 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 followinwgcophi *c1-* g statements are reasons that RNA is believed to be the firg w-**picc 1ohst 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 apparatus used in the experiments conducted by Milp x57p .wev:.adqru) pler .p:.a7pwvqd ur 5pex)and 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, vitalikw d(,nyhga(* sm was a widely accepted theory. This theory suggested that organic compounds, ywa(*(,dkn gh 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 t +aiv)mld7 - rdxlbdvkkh3150 hat the last universal common ancestor (LUCA) could have emerged at ldhbm d -7i01xd 3vl5+akv) krhydrothermal 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 expercenw*xhe0bmv ce 8l ;e(*36atiment to Louis Pasteur’s famous experiment disproving spontaneous generation, using the setm3 e 8ae;*b6w*(xvc elceth0n 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 experiments disproving spontaneous generatiq ;qfox0t f(a8on were replicated by placing broth into various tfoqqa;f(0 x8flasks.

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 Euglena a photosynthetic protist. It is a wpnx2qttk*y( eq cp805 s/ff,living cell which can carry out all the functions of l* q(yt ,k eswcqnf8pf 0/ptx52ife.

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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