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605-655 Level|   Assumption|      
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yaygmat
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Birds need so much food energy to maintain their body temperatures tha 21 Jun 2023, 13:59
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boksana
Birds need so much food energy to maintain their body temperatures that some of them spend most of their time eating. But a comparison of a bird of a seed-eating species to a bird of a nectar-eating species that has the same overall energy requirement would surely show that the seed-eating bird spends more time eating than does the nectar-eating bird, since a given amount of nectar provides more energy than does the same amount of seeds

The argument relies on which one of the following questionable assumptions


(A) Birds of different species do not generally have the same overall energy requirements as each other

(B) The nectar-eating bird does not sometimes also eat seeds

(C) The time it takes for the nectar-eating bird to eat a given amount of nectar is not longer than the time it takes the seed-eating bird to eat the same amount of seeds

(D) The seed-eating bird does not have a lower body temperature than that of the nectar-eating bird

(E) The overall energy requirements of a given bird do not depend on factors such as the size of the bird, its nest-building habits; and the climate of the region in which it lives
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Can someone please explain how to use the negation technique on option C? Bunuel GMATNinja daagh KarishmaB MartyTargetTestPrep
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Birds need so much food energy to maintain their body temperatures tha 21 Jun 2023, 18:58
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yaygmat
boksana
Birds need so much food energy to maintain their body temperatures that some of them spend most of their time eating. But a comparison of a bird of a seed-eating species to a bird of a nectar-eating species that has the same overall energy requirement would surely show that the seed-eating bird spends more time eating than does the nectar-eating bird, since a given amount of nectar provides more energy than does the same amount of seeds

The argument relies on which one of the following questionable assumptions


(A) Birds of different species do not generally have the same overall energy requirements as each other

(B) The nectar-eating bird does not sometimes also eat seeds

(C) The time it takes for the nectar-eating bird to eat a given amount of nectar is not longer than the time it takes the seed-eating bird to eat the same amount of seeds

(D) The seed-eating bird does not have a lower body temperature than that of the nectar-eating bird

(E) The overall energy requirements of a given bird do not depend on factors such as the size of the bird, its nest-building habits; and the climate of the region in which it lives

Can someone please explain how to use the negation technique on option C? Bunuel GMATNinja daagh KarishmaB MartyTargetTestPrep
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(C) The time it takes for the nectar-eating bird to eat a given amount of nectar is not longer than the time it takes the seed-eating bird to eat the same amount of seeds

becomes

Negated (C) The time it takes for the nectar-eating bird to eat a given amount of nectar is longer than the time it takes the seed-eating bird to eat the same amount of seeds

So eating nectar takes longer than eating seeds for the same amount of food.

Say 10 gms of nectar gives more energy (say 100 calories) than 10 gms of seed (say 50 calories).
Say collecting 10 gms of seed takes 10 ins. But if time spent in collecting 10 gms of nectar is more than 10 mins, say 20 mins? Then we cannot say that the nectar eater must spend less time. Then nectar eater spends 20 mins to get 100 calories and seed eater spends 20 mins too to get 100 calories.

Hence we break the conclusion that Nectar eater will spend less time eating.
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Birds need so much food energy to maintain their body temperatures tha 01 Sep 2025, 20:03
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Hello from the GMAT Club VerbalBot!

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