OG-25 题

almarabbit01 · 发表于 2004-2-9 11:38:00

25. It can be inferred from the passage that the morphogent'tic determinants present in the early embryo are
(A) located in the nucleus of the embryo cells
(B) evenly distributed unless the embryo is not developing normally I
(C) inactive until the embryo cells become irreversibly committed to their final function
(0) identical to those that were already present in the unfertilized egg
(E) present in larger quantities than is necessary for , the development of a single individual :
The best answer is E. The socond and third paragraphs of the ; passage indicate that morphogenetic determinants are sub- , stances in the embryo that are activated after the egg has been fertilized and that "tell a cell what to become" (lines 15-16). If, as tb(; author asserts in the first paragraph, biologists have succeeded in dividing an embryo into two parts, each of which survives and develops into a normal embryo, it can be concluded that the quantity of morphogenetic detenninants in the early embryo is greater than that required for the development of a single individual. Choices A, B, and C are directly contradicted by information in the passage, and D makes an assertion that cannot be inferred from the passage.

答案为什么是E？她给的解释不是很能读懂。谢谢！

flora_wang · 发表于 2004-2-21 03:11:00

这个是很难很难的.

25.    It    can    be    inferred    from    the    passage    that    the    morphogent'tic    determinants    present    in    the    early    embryo    are
(A)    located    in    the    nucleus    of    the    embryo    cells    这个不对,不在细胞核里头
(B)    evenly    distributed    unless    the    embryo    is    not    developing    normally    I    不对,明确说是not evenly
(C)    inactive    until    the    embryo    cells    become    irreversibly    committed    to    their    final    <I>function</I>    时间上的分水岭是fertilized or not,这个也不对
(0)    identical    to    those    that    were    already    present    in    the    unfertilized    egg    这个不对,that    the    morphogent'tic    determinants    present    in    the    early    embryo    应该是不同的.至少可以找到有发展
(E)    present    in    larger    quantities    than    is    necessary    for    ,    the    development    of    a    single    individual    :
只有e有味道.就是第一段.科学家分开受精卵而能够发育为两个独立的胚胎,吧e取非,就和文章矛盾了.所以e对.

wangyu73cn · 发表于 2005-1-17 00:59:00

http://forum.chasedream.com/dispbbs.asp?boardID=25&ID=77989&page=1

brissa · 发表于 2005-1-17 08:51:00

以下是引用flora_wang在2004-2-21 3:11:00的发言：
这个是很难很难的.
25. It can be inferred from the passage that the morphogent'tic determinants present in the early embryo are
(A) located in the nucleus of the embryo cells 这个不对,不在细胞核里头
(B) evenly distributed unless the embryo is not developing normally I 不对,明确说是not evenly
(C) inactive until the embryo cells become irreversibly committed to their final <I>function</I> 时间上的分水岭是fertilized or not,这个也不对
(0) identical to those that were already present in the unfertilized egg 这个不对,that the morphogent'tic determinants present in the early embryo 应该是不同的.至少可以找到有发展
(E) present in larger quantities than is necessary for , the development of a single individual :
只有e有味道.就是第一段.科学家分开受精卵而能够发育为两个独立的胚胎,吧e取非,就和文章矛盾了.所以e对.

为什么取非就矛盾，还就对了？

Avantasia · 发表于 2005-3-29 16:27:00

是啊，为什么取非就对了，怎么去呢？

这题感觉难度太大了，有点无从下手的感觉，大家有没有什么好思路呢？

请指教！谢谢！

BiteGmat · 发表于 2005-3-30 00:48:00

取非：决定物质只够一个用的

以前的试验却能培育出两个来，不是矛盾了吗

Avantasia · 发表于 2005-3-30 01:37:00

有道理，谢！

swlfx · 发表于 2005-5-22 19:10:00

DING。

OG-25 题

OG-25 题

所属分类: GMAT考试

正在浏览此版块的会员 ()