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59% (02:13) correct
41%
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For all species of higher animals, reproduction requires the production of eggs but not necessarily the production of sperm. There are some species whose members are all female; the eggs produced by a rare female-only species of salamander hatch without fertilization. This has the drawback that all offspring have genetic codes nearly identical to that of the single parent, making the species less adaptive than species containing both male and female members.
If the statements above are true, each of the following could be true EXCEPT:
(A) There are some species of salamanders that have both male and female members.
(B) There are some species of higher animals none of whose members produce eggs.
(C) There is a significant number of female-only species of higher animals.
(D) Some species of higher animals containing both female and male members are not very adaptive.
(E) Some offspring of species of higher animals containing both female and male members have genetic codes more similar to one parent than to the other parent.
If the statements above are true, each of the following could be true EXCEPT:
(A) There are some species of salamanders that have both male and female members.
(B) There are some species of higher animals none of whose members produce eggs.
(C) There is a significant number of female-only species of higher animals.
(D) Some species of higher animals containing both female and male members are not very adaptive.
(E) Some offspring of species of higher animals containing both female and male members have genetic codes more similar to one parent than to the other parent.
15 Aug 2026, 11:15
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For all species of higher animals, reproduction requires the production of eggs but not necessarily the production of sperm. There are some species whose members are all female; the eggs produced by a rare female-only species of salamander hatch without fertilization. This has the drawback that all offspring have genetic codes nearly identical to that of the single parent, making the species less adaptive than species containing both male and female members.
If the statements above are true, each of the following could be true EXCEPT:
The passage says that every species of higher animal must produce eggs in order to reproduce, while sperm is not always necessary. So we need the choice that cannot possibly be true.
(A) There are some species of salamanders that have both male and female members.
Could be true. The passage mentions one female-only salamander species but does not say all salamander species are female-only.
(B) There are some species of higher animals none of whose members produce eggs.
Cannot be true. The passage explicitly says reproduction in all species of higher animals requires the production of eggs. Therefore, a species in which no member produces eggs could not reproduce.
(C) There is a significant number of female-only species of higher animals.
Could be true. The passage says some species are female-only. It calls one female-only salamander species rare, but does not say female-only species in general are rare.
(D) Some species of higher animals containing both female and male members are not very adaptive.
Could be true. Female-only species are said to be less adaptive than species with both sexes, but that does not mean every species with both sexes is highly adaptive.
(E) Some offspring of species of higher animals containing both female and male members have genetic codes more similar to one parent than to the other parent.
Could be true. Nothing in the passage rules this out.
Answer: (B)
If the statements above are true, each of the following could be true EXCEPT:
The passage says that every species of higher animal must produce eggs in order to reproduce, while sperm is not always necessary. So we need the choice that cannot possibly be true.
(A) There are some species of salamanders that have both male and female members.
Could be true. The passage mentions one female-only salamander species but does not say all salamander species are female-only.
(B) There are some species of higher animals none of whose members produce eggs.
Cannot be true. The passage explicitly says reproduction in all species of higher animals requires the production of eggs. Therefore, a species in which no member produces eggs could not reproduce.
(C) There is a significant number of female-only species of higher animals.
Could be true. The passage says some species are female-only. It calls one female-only salamander species rare, but does not say female-only species in general are rare.
(D) Some species of higher animals containing both female and male members are not very adaptive.
Could be true. Female-only species are said to be less adaptive than species with both sexes, but that does not mean every species with both sexes is highly adaptive.
(E) Some offspring of species of higher animals containing both female and male members have genetic codes more similar to one parent than to the other parent.
Could be true. Nothing in the passage rules this out.
Answer: (B)
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