GWD-28-13

emmalululu123

Information in the passage suggests that which of the following is true of carotenoids that a male animal uses for detoxification processes?
这里特指拿来排毒的色素
C选项在原文 It may be that males can use scarce carotenoids either for immune defense and detoxification or for attracting females. 这里的理解是，由于色素有限，动物要分配给排毒或者吸引异性。譬如十克的色素，有三克是用来排毒的，剩下的是用来吸引异性。题目问的是用来排毒的这三克色素，而不是所有的十克。感觉题目问得特别tricky。
A. They were not acquired directly from plants and algae. 不对，文章开头明显说了是外界获取的
B. They cannot be replenished through foraging.  文章说色素scarce，暗示不能补给。
C. They cannot be used simultaneously to brighten coloration.
D. They do not affect the animal`s susceptibility to parasites. 文中提及会影响昆虫抗病能力。
E. They increase the chances that the animal will be selected as a mate. 色素用于排毒应该是减少了拿去发亮的色素，进而减少被候选。这个作用相反