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Jeff_999 Posted 21 years ago
Grammar
Antigens
0 "Histocompatibility antigens that attack foeign tissue in the body cannot have been 01 i 00 ___ through evolution expressly to ___ 02 i 00 organ transplantation; on the contrary, they have been found to facilitate many essential biological functions. 02 br
00 A. designed … retain 02 br
00 B. produced … aid 02 br
00 C. developed … enhance 02 br
00 D. selected … promote 02 br
00 E. conserved … foil" 02 br
02 br
00 I know that only E sounds right. By judging from the second part: the antigens are to facilitate biological functions, they cannot destroy organ transplantation. What I want to ask is if the antigens are conserved. 0-
00 A. designed … retain 02 br
00 B. produced … aid 02 br
00 C. developed … enhance 02 br
00 D. selected … promote 02 br
00 E. conserved … foil" 02 br
02 br
00 I know that only E sounds right. By judging from the second part: the antigens are to facilitate biological functions, they cannot destroy organ transplantation. What I want to ask is if the antigens are conserved. 0-
Top answer
0 In the sense of "conserved" used in this sentence, yes, the antigens are conserved. The truth of this state of affairs is practically a presupposition of the entire sentence. 02 br 02 br 00 I hope I understood what you were asking.
- 0 In the sense of "conserved" used in this sentence, yes, the antigens are conserved.
- The truth of this state of affairs is practically a presupposition of the entire sentence.
- 02 br 02 br 00 I hope I understood what you were asking.
- 02 br 02 br 00 CJ 0-
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3 Answers
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0 In the sense of "conserved" used in this sentence, yes, the antigens are conserved. The truth of this state of affairs is practically a presupposition of the entire sentence. 02 br
02 br
00 I hope I understood what you were asking. 02 br
02 br
00 CJ 0-
02 br
00 I hope I understood what you were asking. 02 br
02 br
00 CJ 0-
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0 Thank you, CaliJim. But I really cannot see that the antigens are conserved from this sentence: 02 br
00 "Histocompatibility antigens cannot have been conserved through evolution expressly to foil organ transplantation. " 02 br
00 Could you explain it with more details? I suppose the present perfect tense " 01 i 00 have been 02 i 00 " after " 01 i 00
00 "Histocompatibility antigens cannot have been conserved through evolution expressly to foil organ transplantation. " 02 br
00 Could you explain it with more details? I suppose the present perfect tense " 01 i 00 have been 02 i 00 " after " 01 i 00
00
0 "Histocompatibility antigens cannot have been conserved through evolution expressly to foil organ transplantation." 02 br
02 br
00 The processes of nature (whereby these substances evolved and continue to be present in us) are not thinking processes. Such evolutionary processes act passively through time. They cannot think and plan. They occur as the result of reactions of
02 br
00 The processes of nature (whereby these substances evolved and continue to be present in us) are not thinking processes. Such evolutionary processes act passively through time. They cannot think and plan. They occur as the result of reactions of
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