VII:Read the following passage carefully and then choose the best answer to  each question. Butterflies are among the most extensively studied insects - an estimated 90 percent of the world's species have scientific names. As a consequence, they are perhaps the best group of insects for  examining  patterns  of  terrestrial  biotic  diversity  and distribution.  Butterflies  also  have  a favorable  image with  the  general  public. Hence,  they  are  an  excellent  group  for  communicating  information on science and conservation issues such as diversity.  Perhaps  the aspect of butterfly diversity  that has  received  the most attention over  the past  century is the striking difference in species richness between tropical and temperate regions.  For example,  in 1875 one biologist pointed out  the diversity of butterflies  in  the Amazon  when  he mentioned  that  about  700  species were  found within  an  hour's walk, whereas  the  total number  found on  the British  islands did not  exceed 66,  and  the whole of Europe  supported only  321. This early comparison of tropical and temperate butterfly richness has been well confirmed.A  general  theory  of  diversity  would  have  to  predict  not  only  this  difference  between temperate  and  tropical  zones,  but  also  patterns within  each  region,  and  how  these  patterns  vary among  different  animal  and  plant  groups. However,  for  butterflies,  variation  of  species richness within  temperate  or  tropical  regions,  rather  man  between  them,  is poorly  understood.  Indeed, comparisons  of  numbers  of  species  among  the Amazon  basin,  tropical Asia,  and Africa  are  still mostly "personal communication" citations, even for vertebrates, In other words, unlike comparison between temperate and tropical areas, these patterns are still in the documentation phase.In  documenting geographical  variation  in  butterfly  diversity,  some  arbitrary,  practical decisions are made. Diversity,  number  of  species,  and  species  richness  are  used synonymously; little is known about the evenness of butterfly distribution. The New Worldbutterflies make up the preponderance of examples because they are the most familiar species. It is hoped that by focusing on them, the errors generated by imperfect and incomplete taxonomy will be minimized.
Câu 1: Which aspect of butterflies does the passage mainly discuss?
         
         A.  Their adaptation to different habitats              
         
         B. Their names
         
         C. Their physical characteristics   
         
         D. Their variety
Câu 2: The word consequence in the passage is closest in meaning to "………….".
         
         A. explanation              
         
         B. result        
         
         C. analysis       
         
         D. requirement
Câu 3: Butterflies  are  a  good  example  for  communicating  information about  conservation  issues because they …………… .
         
         A. are found mainly in temperate climates                  
         
         B. have been given scientific names
         
         C. are simple in structure              
         
         D. are viewed positively by people
Câu 4: The word striking in the passage is closest in meaning to "……………..".
         
         A. successful                    
         
         B. noticeable    
         
         C. confusing 
         
         D. physical
Câu 5: The word exceed  in the passage is closest in meaning to "……………".
         
         A.  come close to                 
         
         B.  locate            
         
         C. go beyond      
         
         D. allow
Câu 6: All  of  the  followings  are mentioned as  being  important parts of a general  theory  of  diversity EXCEPT ……………….. .  
         
         A. migration among temperate and tropical zones            
         
         B. variation of patterns of distribution of species among different animals and plants
         
         C. differences between temperate and tropical zones
         
         D. patterns of distribution of species in each region
Câu 7: The author mentions tropical Asia  in the passage as an example of a location where ……….  
         
         A. butterflies are affected by human populations            
         
         B. documenting plant species is more difficult than documenting butterfly species
         
         C. butterfly behavior varies with climate
         
         D. a general theory of butterfly diversity has not yet been firmly established
Câu 8: Which of the following is NOT well understood by biologists?
         
         A. Differences in species richness between temperate and tropical regions            
         
         B. Comparisons of behavior patterns of butterflies and certain animal groups
         
         C. European butterfly habitats
         
         D. Differences in species richness within a temperate or a tropical region
Câu 9: The idea "little is known about the evenness of butterfly distribution" is that ………… .
         
         A. we know about butterfly evenness distribution to some extent            
         
         B. we don't know anything about butterfly evenness distribution
         
         C. there are many other things that we don't know about butterfly evenness distribution
         
         D. we know much about butterfly evenness distribution
Câu 10: The word generated  in the passage is closest in meaning to "……………".
         
         A. caused                    
         
         B. assisted       
         
         C. estimated         
         
         D. requested
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