Natural selection tends to eliminate genes that
cause inherited diseases, acting most strongly
against the most severe diseases; consequently,
hereditary diseases that are ----- would be
expected to be very -----, but, surprisingly,
they are not.
(A) lethal…rare
(B) untreated … dangerous
(C) unusual. . refractory
(D) new … perplexing
(E) widespread … acute
Pls explain to me why A is correct?
I choose B during solving because for opt E i eliminated widespread because since it is heridetory that disease would be specfic to their family. for C and D god eliminated because no evidence of “new” unsual was there. so thats that. No for opt A i expected that since natural selection is acting against severe disesases there there will rare… and in the prompt it is given that “but, surprisingly,
they are not.” So i eliminated opt A…
This was my thought process. can someone help me out here
From the question we get that: natural selection tends to eliminate genes causing inherited diseases, particularly severe ones. Therefore, we would expect lethal (severe) diseases to be rare. However, the statement ends with “but, surprisingly, they are not.” This indicates that despite our expectations, lethal diseases are not rare.
Now, let’s analyze the options:
(A) lethal…rare: This choice aligns perfectly with the information given. We expect lethal diseases to be rare, but they are not. Hence, this is the correct answer.
(B) untreated … dangerous: The passage doesn’t discuss treatment of diseases, so we can eliminate this option.
(C) unusual. . refractory: The passage doesn’t provide information about diseases being unusual or refractory (resistant to treatment or control). So, this can be eliminated.
(D) new … perplexing: The passage doesn’t mention anything about diseases being new or perplexing. So, this option can be eliminated.
(E) widespread … acute: The passage doesn’t suggest that hereditary diseases are widespread or acute. So, this option can be eliminated.
Thank you so muchh