Pankaj0901 wrote:
1. The author of the passage implies that extremophilic Archaeans
(A) are able to maintain molecular integrity of cellular components past what was formerly accepted as the thermal threshold of life.
(B) have been known to exist in moderate environments for some years, but their extremophilic properties have only recently been discovered.
(C) are able to live and thrive in temperatures higher than 160 degrees centigrade.
(D) were responsible for the development of a distinct kingdom in the classification scheme for biological life.
(E) are the oldest known form of multi-cellular biologic life.
Why the answer is not C. It is stated in the paragraph as well- "So-called extremophilic Archaeans have been discovered to thrive in temperatures as high as 160 degrees centigrade."
3. In the passage, the author’s chief concern is to
(A) acknowledge an error in mainstream science.
(B) explain the reason for a modification of a system.
(C) describe an anomalous biological phenomenon.
(D) trace the development of a scientific theory.
(E) outline a system of scientific classification.[/box_in][/box_out]
Can someone please explain each of the options:
A) I find this relevant as the author is acknowledging the error. Why is this wrong?
B) Yes, reason is also explained. But is this the chief concern. Is A not the chief concern over option B?
C) Even there is an anamoly presented. Why is this option wrong?
D) Understood- Not tracing development here.
E) Not relevant
Hi
Pankaj0901,
Quote:
(C) are able to live and thrive in temperatures higher than 160 degrees centigrade.
For Question 1, C is incorrect, because "as high as 160 degrees centigrade", doesn't imply higher than 160 degrees centigrade. It simply implies, that extremophilic Archaeans have been discovered to thrive in temperatures this high.
3. In the passage, the author’s chief concern is to
Quote:
(A) acknowledge an error in mainstream science.
We cannot infer any error. Lines: "This new level included the new domain Archaean. Prior to the discovery of Archaeans, it had been generally accepted that no life could exist in temperatures much hotter than 60 degrees centigrade.", do not imply any error. They are simply mentioned as an assumption.
Quote:
(B) explain the reason for a modification of a system.
Correct. The author talks about Archaeans, which did not fit into the kingdom classification scheme for biological life,
led to the creation of the domain classification level, above the kingdom level.. How it has been discovered that Archaeans can thrive in temperatures as high as 160 degrees centigrade, and how earlier it was not the case and why was it so. Thus, we can infer that author's chief concern is to explain the reason for a modification of a system.
Quote:
(C) describe an anomalous biological phenomenon.
Clearly incorrect, as we cannot infer if this is an anomalous biological phenomenon as author has not discussed it in the passage. It is a discovery that caused some modifications of the system.
Hope This Helps.
Thanks.