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习题练习:SL/HL Topic D4.1 Natural selection

 作者: admin 发布日期: 2025-02-01 14:17   总分: 14分  得分: _____________

答题人: 游客未登录  开始时间: 25年02月01日 01:25  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) (组内1/4) 切至整卷模式 搜藏此题  
第 1 题组 (共 4 题 4 分)
  1. What is meant by the term “adaptation”?oq lf,hxrb p; tialo:1: :ed cp.p:23c

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2#
 
单选题 ( 1.0 分) (组内2/4) 切至整卷模式 搜藏此题  
  2. Why does sexual reproduction increase the rate of evolution in comparisonf:1 ea.a19ah ok* bdoz to as1bkz.91a:ahooead * f exual reproduction?

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3#
 
单选题 ( 1.0 分) (组内3/4) 切至整卷模式 搜藏此题  
  3. Which of the following are factor g 8ejkxxh37h2s involved in natural selection?
I. Intraspecific competition.
II. Environmental changes.
III. Overproduction of offspring.
IV. Selective breeding.

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4#
 
单选题 ( 1.0 分) (组内4/4) 切至整卷模式 搜藏此题  
  4. Which points describe aspects of 4g f9+jx k+2et2tqp wlhow sexual selection can drive evolution in a populatit f k+e2pw2 t49ql+jgxon?
I. Differences in behaviour can be used as a sign of overall fitness.
II. Differences in physical traits can affect success in attracting a mate.
III. Sexual reproduction requires the fusion of haploid gametes.
IV. Different sexes choose different ecological niches to live in.

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5#
 
问答题 ( 1.0 分) (组内1/2) 切至整卷模式 搜藏此题  
第 2 题组 (共 2 题 2 分) 当前第1/2题
题组内容描述:
5. The guppy (Poecilia reticulata) is a small tropical fish. They are predated upon by various larger fish species.The males (top in picture) have great variation in the number and colour of spots on their body, ranging from one small spot to several spots and a grey colour to a variety of bright colours (pigment polymorphism). Males with brighter colours have greater breeding success
John Endler observed wild guppy populations and conducted several investigations on guppy populations in rivers with high levels and low levels of predation.In one investigation, he moved grey coloured males from a stream with high rates of predation to a stream with less predation.
a. Suggest why males from an area of high predation would have dull grey colouraaz 7w cdt6l-q/tizl7/ 6w-qadct on.
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6#
 
问答题 ( 1.0 分) (组内2/2) 切至整卷模式 搜藏此题  
第 2 题组 (共 2 题 2 分) 当前第2/2题
题组内容描述:
5. The guppy (Poecilia reticulata) is a small tropical fish. They are predated upon by various larger fish species.The males (top in picture) have great variation in the number and colour of spots on their body, ranging from one small spot to several spots and a grey colour to a variety of bright colours (pigment polymorphism). Males with brighter colours have greater breeding success
John Endler observed wild guppy populations and conducted several investigations on guppy populations in rivers with high levels and low levels of predation.In one investigation, he moved grey coloured males from a stream with high rates of predation to a stream with less predation.
b. After 15 generations in the low-predationfz (+s ae;ah)u steam the offspring of this population of grey guppies showed much more pigmeashu (f a+;e)znt polymorphism.
Explain how this result demonstrates evolutionary change.
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7#
 
问答题 ( 1.0 分) (组内1/5) 切至整卷模式 搜藏此题  
第 3 题组 (共 5 题 5 分) 当前第1/5题
题组内容描述:
6. Explain how the following factors contribute to natural selection within a population.
I. Interspecific competition.l1esqiwct30nq wp,-u na/2; y
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8#
 
问答题 ( 1.0 分) (组内2/5) 切至整卷模式 搜藏此题  
第 3 题组 (共 5 题 5 分) 当前第2/5题
题组内容描述:
6. Explain how the following factors contribute to natural selection within a population.
II. Density independent abiotic fac ahme5:(//k7fxvf g dg mo:6xvtors.
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9#
 
问答题 ( 1.0 分) (组内3/5) 切至整卷模式 搜藏此题  
第 3 题组 (共 5 题 5 分) 当前第3/5题
题组内容描述:
6. Explain how the following factors contribute to natural selection within a population.
III. Mutation.
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10#
 
问答题 ( 1.0 分) (组内4/5) 切至整卷模式 搜藏此题  
第 3 题组 (共 5 题 5 分) 当前第4/5题
题组内容描述:
6. Explain how the following factors contribute to natural selection within a population.
IV. Sexual selectionh4lb)e-dv /a: rmt w;4f ;hvzy(bbwi2dwa3;y.
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11#
 
问答题 ( 1.0 分) (组内5/5) 切至整卷模式 搜藏此题  
第 3 题组 (共 5 题 5 分) 当前第5/5题
题组内容描述:
6. Explain how the following factors contribute to natural selection within a population.
V. Overproduction of offsprinazhh /+ i* t7bmr/fj4dg.
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12#
 
问答题 ( 1.0 分) (组内1/2) 切至整卷模式 搜藏此题  
第 4 题组 (共 2 题 2 分) 当前第1/2题
题组内容描述:
7. Phenylketonuria, PKU, is a metabolic disorder caused by a recessive allele which produces a non-functioning enzyme causing a build-up of the amino acid phenylalanine.In Finland, 1 in 200,000 babies are born with the disorder.
a. Calculate the allele frequency of PKU in t;3ny o-y*t emfs7i jl,uoia5bc(uw/5he population of Finland.
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13#
 
问答题 ( 1.0 分) (组内2/2) 切至整卷模式 搜藏此题  
第 4 题组 (共 2 题 2 分) 当前第2/2题
题组内容描述:
7. Phenylketonuria, PKU, is a metabolic disorder caused by a recessive allele which produces a non-functioning enzyme causing a build-up of the amino acid phenylalanine.In Finland, 1 in 200,000 babies are born with the disorder.
b. Calculate the proportion of the Finnish population who are hetero s,u4k7v lks0vzygous for the gene (i.e. , 4v7s vlskk0ucarriers of the PKU gene).
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14#
 
问答题 ( 1.0 分) (组内1/1) 切至整卷模式 搜藏此题  
第 5 题组 (共 1 题 1 分)
8. Explain how artificial selection causes changes in allele frequency within a vye m 36bm+bu*population over several generbmmu3v6+e yb *ations
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