Kate: The recent decline in numbers of the Tennessee warbler, a North American songbird that migrates each fall to coffee plantations in South America, is due to the elimination of dense tree cover that formerly was a feature of most South American coffee plantations.
Scott: The population of the spruce budworm, the warbler's favourite prey in North America, has been dropping. This is a more likely explanation of the warbler's decline.
Question: Which of the following, if true, most seriously calls Scott's hypothesis into question?
1). The numbers of the Baltimore oriole, a songbird that does not eat budworms but is as dependent on South America coffee plantations as is the Tennessee warbler, are declining
2). The spruce budworm population has dropped because of a disease that can infect budworms but not Tennessee warblers
3). The drop in the population of the spruce budworm is expected to only be temporary
4). Many Tennessee warblers have begun migrating in the fall to places other than traditional coffee plantations
5). Although many North American songbirds have declined in numbers, no other species has experienced as great a decline as has the Tennessee warbler.
my concern: kindly tell me one thing if A had been as below then will it question Scott's conclusion more than does the present A?
modified A : The numbers of the Baltimore oriole, a songbird that does eat budworms and is as dependent on South America coffee plantations as is the Tennessee warbler, are declining
after all what is scott saying?
scott is saying: The population of the spruce budworm, the warbler's favourite prey in North America, has been dropping. This is a more likely explanation of the warbler's decline.
so we need to show that ,somehow, there is another bird that does eat spruce budworm ,however the population of this "another bird" is not dropping despite the drop in its food .on the contrary this "another bird" is as much dependent on those forest as is Tennessee warbler and because the forests are declining so that is effectively leading to the decline of Tennessee warbler
thanks and regards
Scott: The population of the spruce budworm, the warbler's favourite prey in North America, has been dropping. This is a more likely explanation of the warbler's decline.
Question: Which of the following, if true, most seriously calls Scott's hypothesis into question?
1). The numbers of the Baltimore oriole, a songbird that does not eat budworms but is as dependent on South America coffee plantations as is the Tennessee warbler, are declining
2). The spruce budworm population has dropped because of a disease that can infect budworms but not Tennessee warblers
3). The drop in the population of the spruce budworm is expected to only be temporary
4). Many Tennessee warblers have begun migrating in the fall to places other than traditional coffee plantations
5). Although many North American songbirds have declined in numbers, no other species has experienced as great a decline as has the Tennessee warbler.
my concern: kindly tell me one thing if A had been as below then will it question Scott's conclusion more than does the present A?
modified A : The numbers of the Baltimore oriole, a songbird that does eat budworms and is as dependent on South America coffee plantations as is the Tennessee warbler, are declining
after all what is scott saying?
scott is saying: The population of the spruce budworm, the warbler's favourite prey in North America, has been dropping. This is a more likely explanation of the warbler's decline.
so we need to show that ,somehow, there is another bird that does eat spruce budworm ,however the population of this "another bird" is not dropping despite the drop in its food .on the contrary this "another bird" is as much dependent on those forest as is Tennessee warbler and because the forests are declining so that is effectively leading to the decline of Tennessee warbler
thanks and regards
