GWD26-8这个答案是100％标准答案么？

MaccMichAA

GWD-26-Q7-Q9

There is no consensus among

researchers regarding what qualifies a

substance as a pheromone. While most

Line agree on a basic definition of pheromones

(5) as chemicals released by one individual

   of a species which, when detected by

   another individual of the same species,

   elicit a specific behavioral or physiological

   response, some researchers also specify

(10) that the response to pheromones must be

   unconscious. In addition, the distinction

   between pheromones and odorants—

   chemicals that are consciously detected

   as odors---can be blurry, and some

(15) researchers classify pheromones as a

type of odorant. Evidence that pheromone

responses may not involve conscious odor

perception comes from the finding that in

many species, pheromones are processed

(20) by the vomeronasal (or accessory olfactory)

    system, which uses a special structure in

the nose, the vomeronasal organ (VNO),

to receive chemical signals. The neural

connections between the VNO and the

(25) brain are separate from those of the main

olfactory system, whose processing of

odorants triggers sensations of smell. But

while the VNO does process many animal

pheromone signals, not all animal phero-

(30) mones work through the VNO. Conversely,

not all chemical signals transmitted via the

VNO quality as pheromones. For example,

garter snakes detect a chemical signal from

earthworms—one of their favorite foods—via

(35) the VNO, and they use this signal to track

their prey.

--------------------------------------------------------------------------------------------------

Q8

According to the passage, the fact that

pheromones are processed by the VNO

in many animal species has been taken

as evidence of which of the following?

The accessory and main olfac-

Tory systems are not separate

Odorants and pheromones are

not distinct types of chemicals.

Odorants and pheromones both

elicit a specific behavioral

response.

Pheromones do not trigger con-

scious sensations of smell.

Pheromones aid animals in track-

ing prey.

Answer: D

黑线部分是我得出的答案 Jinni版本的答案是第四个D 请好心的哥哥姐姐给个解释 为什么不是E呢

yaomao

    

Evidence that pheromone

    

responses may not involve conscious odor

    

perception comes from the finding that
in

    

many species, pheromones are processed

    

(20) by the vomeronasal (or accessory olfactory)

    

    system,
which uses a special structure in

D答案是玫瑰色部分的改写哈