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标题: one question, 3x. [打印本页]

作者: breew 时间: 2008-7-26 09:15
标题: one question, 3x.

biologist: we know the following things about plant x. specimmens with fuzzy seeds always have long stems but never have white flowers. specimens with curled leaves always have white flowers, and specimens with thorny seedpods always have curlved leaves. a specimen of plant x in my garden has along stem and curlved leaves.

from the bio's statements, which one of the following can be properly inferred abou the specimen of plant x in the bio's garden?

the answer is it has white flowers but lacks fuzzy seeds.

can someone tell me why? thanks.

作者: salitis 时间: 2008-7-28 01:51
Curlved leaves leads to white flowers, however white flowers excludes the possibility of fuzzy seeds

作者: breew 时间: 2008-7-28 20:18
but it says it has a long stem and curve leaves in garden?

作者: icewarm 时间: 2008-7-29 07:04
fuzzy seed(fs)--->long stem(ls) + white flowers(wf) not = wf or ls not --->fs not.
curlve leaves(cl)--->wf
thorny seedpod(ts)--->cl--->wf

plant x ls + cl--->wf--->fs not.

Try digraming when you are deal with formal logic questions. Read Power Score Logic Reseaonging Bible.

作者: salitis 时间: 2008-7-29 23:00
long stem didn't make any contribution here.

作者: breew 时间: 2008-8-1 06:02
thanks icewarm and salitis!!

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