The fossil record shows that the climate of North America warmed and dried at the end of the Pleistocene period. Most of the species of large mammals
then living on the continent became extinct, but the smaller mammalian species survived.
Which of the following, if true, provides the best basis for an explanation of the contrast described above between species of large mammals and species of small mammals?
(A) Individual large mammals can, in general, travel further than small mammals and so are more able to migrate in search of a hospitable environment.
(B) The same pattern of comparative success in smaller, as opposed to larger, species that is observed in mammals is also found in bird
species of the same period.
(C) The fossil record from the end of Pleistocene period is as clear for small mammals as it is for large mammals.
(D) Larger mammals have greater food and space requirements than smaller mammals and are thus less able to withstand environmental change.
(E) Many more of the species of larger mammals than of the species of smaller mammals living in North America in that period had originated in climates that were warmer than was that of North America before the end of the Pleistocene period.
E
the answer should be D.
the statement says that the larger mammals became extinct after the environment became warmer and the question is looking for an explanation of the contrast with smaller mammals. the option E states that the larger mammals orignated from a war environment prior to the period which weakens the argument… as it suggests the larger mammals should’nt be extinct due to warming of the environment.
not e has to be d
d
(D) Larger mammals have greater food and space
requirements than smaller mammals and are
thus less able to withstand environmental
change.
bcoz Larger mammals cannot migrate.
d
D
d
d
D
D… can’t be E
D
d
D
D. This is the only option which is best describing the contrast between the animals & also supporting the argument.
D.
E.
D
D
The smaller animals can adjust themselves to he changing environmental conditions and they require lesser space and food to survive.So D should be answer as per my explanation.
D is the correct answer.
Option D is correct.
My choice is option A. Your comments are invited.
d..this should be the answer….
option D
option D
My vote for Option D
D
@sanjay
Option A is incorrect. It seems to bring the reader to the conclusion that large mammals were able to survive because they could migrate which is opposite to what the problem states.
Ans D
Ans is C : If the fossil record is true for one thing then fossil record again can be used for concluding other things.
Why not D, because D is talking about food & space requirements of Large Mammals which are not at all concerned with environment change, environment change will not cause any shortage of space and food.
What is the official answer????
D
D
Answer is D.
D is the answer.
D