请问问og161

gracezhong78

Adult female rats who have never before encountered rat pups will start to show maternal behaviors after being confined with a pup for about seven days. This period can be considerably shortened by disabling the female’s sense of smell or by removing the scent-producing glands of the pup.

 

Which of the following hypotheses best explains the contrast described above?

(A) The sense of smell in adult female rats is more acute than that in rat pups.

(B) The amount of scent produced by rat pups increases when they are in the presence of a female rat that did not bear them.

(C) Female rats that have given birth are more affected by olfactory cues than are female rats that have never given birth.

(D) A female rat that has given birth shows maternal behavior toward rat pups that she did not bear more quickly than does a female rat that has never given birth.
            E

(E) The development of a female rat's maternal interest in a rat pup that she did not bear is inhibited by the odor of the pup.
            

提干没有看懂，提干和选项有什么关系，为什么要选E啊？og的解释很困惑！

gracezhong78

忘了说问题了！

题干没有看懂，题干和选项有什么关系呢？og的解释很困惑！

The contrast to be explained is that female rats develop maternal behaviors toward pups that are not their own faster when they cannot smell the pups than when they can. If the odor of a strange pup inhibits the development of maternal interest, the contrast is explained, so E is the best answer.

[此贴子已经被作者于2006-6-19 18:49:12编辑过]

熏依草

说的是没遇见过小老鼠的母老鼠和小的关在一起七天表现出母性，另一句话是说，如果把母的嗅觉搞坏或者把小的散发出气味的腺体移除，表现母性的时间会短啊

E选项正好说母的对不是她生的小的表现出母性，被小的那个腺体限制啊，与移除更容易表现母性正好对应。

MM 这样解释应该很明白了吧？

gracezhong78

谢谢楼上的mm！