首页
登录
职称英语
It can be inferred from the passage that the morphogenetic determinants present
It can be inferred from the passage that the morphogenetic determinants present
游客
2024-01-13
68
管理
问题
It can be inferred from the passage that the morphogenetic determinants present in the early embryo are______ [br] According to the passage, when biologists believed that the cells in the early embryo were undetermined, they made which of the following mistakes?
选项
A、They did not attempt to replicate the original experiment of separating an embryo into two parts.
B、They did not realize that there was a connection between the issue of cell determination and the outcome of the separation experiment.
C、They assumed that the results of experiments on embryos did not depend on the particular animal species used for such experiments.
D、They assumed that it was crucial to perform the separation experiment at an early stage in the embryo’s life.
E、They assumed that different ways of separating an embryo into two parts would be equivalent as far as the fate of the two parts was concerned.
答案
E
解析
E is the best answer. According to the author, early investigators arrived at the conclusion that the cells of the embryo are undetermined because they “found that if they separated an invertebrate animal embryo into two parts at an early stage of its life, it would survive and develop as two normal embryos” (lines 1-6). However, later biologists discovered that when an embryo was cut in places different from the one used by the early investigators, it did not form two whole embryos. Because the earlier biologists apparently arrived at their conclusion without attempting to cut an embryo in different planes, it would appear that they assumed, erroneously, that different ways of separating the embryos would not affect the fate of the two embryo parts.
转载请注明原文地址:https://tihaiku.com/zcyy/3359660.html
相关试题推荐
Atpresenttime,peoplehaveatrendtoliveinthe_________.A、suburbB、suburbs
IfZisrepresentedbythedecimal0.W7,whatisthedigitW?[img]2011q3/ct_egm
If△and[img]2011q3/ct_egmatqm_egmatqchoose_0378_201121[/img]representsingle
Twocubeseachhas6sides,whichrepresents1,2,3,4,5,6respectively.Put
Eachofthefivedivisionsofacertaincompanysentrepresentativestoaconfer
[img]2022m10x/ct_ve01204002j_0014_221018[/img]Thefigureaboverepresentsanet
If1
IfWhitneywrotethedecimalrepresentationsforthefirst300positiveinteger
Acertainmathematicaloperationmayberepresentedbythesymbol@.Forallnonz
Twodiceseachhassixsides,whichrepresentsixvalues1,2,3,4,5,6respec
随机试题
[originaltext]M:So,Susan,doyouhaveanythingplannedforthisSaturday?W:
[originaltext](9)Ourelectriccaristhewayofthefuture.Automobileman
图示电路中,运算放大器输出电压的极限值为±U,设输入电压u1=sinωt,如果将
在普通高中美术课程中开设中国画课程,该课程是属于( )内容系列。A.美术鉴赏
20l4年8月,()发布《私募投资基金监督管理暂行办法》。A.国家工商行政管理
下列气态污染物中,对建筑物有腐蚀作用的有( )。A.二氧化硫 B.一氧化氮
A.接骨丸 B.跌打丸 C.七厘散 D.舒筋活血片 E.活血止痛散宜用黄
下列关于成本模式计量的投资性房地产的说法中,不正确的是()。A.租金收入通
2015年12月实际完成的工程按基准日的价格计算工程进度款为200万元,调值公式
耕地征用补偿费通常按该耕地被征用前三年平均年产值的()倍进行补偿。A.4~6
最新回复
(
0
)