Our Premium and Ultimate plans guarantee up to 90+ points score increase or your money back.
We cover every section of the GMAT with in-depth lessons, 5000+ practice questions and realistic practice tests.
Study whenever and wherever you want with our iOS and Android mobile apps.
Adaptive learning technology focuses on your academic weaknesses.
The author describes conditions during the Paleocene-Eocene maximum in order to
The passage does not state or imply that temperatures are currently rising. We only know that climate change has caused detrimental effects on endotherms, but these results could be from either rising or decreasing temperatures.
The second sentence of the third paragraph tells us that endotherms are currently suffering drastic and detrimental effects because of climate change. The third sentence goes on to tell us that scientists cannot be sure that it is climate change that is the cause for these effects because the studies have been conducted over relatively short periods of time.
So, how is it that the author is able to say in the second sentence that climate change is indeed responsible for these effects? He or she uses the information in the first sentence to show that climate change over a very long period of time did indeed have a proven effect on endotherms.
The information the author gives about the effects of climate change during the Paleocene-Eocene maximum does not show only a negative effects; although some animals became extinct, others appeared (which can't be construed as a completely negative effect).
The past results of climate change are not the same as the current results of climate change: according to what is stated in the passage, endotherms are currently being harmed, whereas in the past some were harmed while others flourished.
Although it may seem that the author is unsure about the effects of climate change, she or he still states in the second sentence of the third paragraph that the effects of climate change on endotherms is drastic and detrimental. Although this seems like a paradox, this first sentence is crucial in explaining why it is not.