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
64
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
Nextmorning,fourwordsfromthebook—"takethelongview"—werestilli
Doyouknowwhenyourspouse’sangrytirade(长篇的激烈言辞)isactuallymaskingfear
说明:假设你是销售部的李辉,根据下列内容拟一张交给经理JohnSmith先生的请假条。时间:2020年12月25日内容:1.我父亲身体不好,病了有一段
左旋多巴的临床应用是()A.脑膜炎后遗症 B.乙型肝炎 C.失眠 D
老魏是个性格耿直的老教师,但是老是针对你。发生这种情况,你怎么处理?
关于变量间的相关关系,正确的表述是()。A.长期来看,期货主力合约价格与持仓
(2020年真题)制定《期货从业人员执业行为准则(修订)》的宗旨包括()。A.
某人连续6年每年年末存入银行100万元,银行年利率5%,按年复利计息,第6年末一
井巷贯通的形式有()。A.一井内巷道贯通 B.两井之间巷道贯通 C.立井贯
最新回复
(
0
)