
代號:20140
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頁次:4
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請依下文回答第 34 題至第 37 題:
Pheromones are substances that serve as chemical signals between members of the same species. They are
secreted to the outside of the body and cause other individuals of the species to have specific reactions. Pheromones,
sometimes also called "social hormones," affect a group of individuals somewhat like hormones do to an individual
animal. Pheromones are the predominant medium of communication among insects (but rarely the sole method).
Some species have simple pheromone systems and produce only a few pheromones, but others produce many with
various functions. Pheromone systems are the most complicated in some of the so-called social insects, insects that
live in organized groups.
Pheromones play various roles in the activities of insects. They may act as alarm substances, play a role in
individual and group recognition, serve as attractants between sexes, mediate the formation of aggregations, identify
foraging trails, and be involved in caste determination. For example, pheromones involved in caste determination
include the "queen substance" produced by queen honey bees. Aphids, which are particularly vulnerable to predators
because of their gregarious habits and sedentary nature, secrete an alarm pheromone when attacked that causes nearby
aphids to respond by moving away.
34 What do the passages mainly discuss?
how insects use pheromones to facilitate reproduction
how pheromones are produced by insects
why analyzing insect pheromones is thorny
the different uses of pheromones among various insect species
35 What does the underlined phrase "specific reactions" refer to?
roaming instinct general aggression
particular behavior triggered by pheromones species-specific hibernation cycles
36 The purpose of the underlined word "hormones" is to point out
chemical signals that are common among insects
specific responses of various species to chemical signals
similarities between two chemical substances
how insects produce different chemical substances
37 The underlined word "sedentary" is closest in meaning to
inactive inefficient untouchable unbalanced
請依下文回答第 38 題至第 40 題:
All of us know from experience that we are much more reluctant to walk away from an ongoing enterprise in
which we have invested a lot than from one in which we have invested only a little. That is true of our investment in
human relationships, in business projects, or in the stock market. It is true regardless of whether our investment is in
the form of money, time, or effort.
The same principle applies to parental investment in potential offspring. Even at the moment when an egg is
fertilized by a sperm, the resulting fertilized embryo generally represents a greater investment for the female than for
the male, because in most animal species the egg is much larger than the sperm. While both eggs and sperms contain
chromosomes, the egg in addition must contain enough nutrients and metabolic machinery to support the embryo’s
further development for some time, at least until the embryo can start feeding itself. Sperms, in contrast, need contain
only a flagellar motor and sufficient energy to drive that motor and support swimming for at most a few days. As a
result, a mature human egg has roughly one million times the mass of the sperm that fertilizes it. Hence a fertilized
embryo, viewed simply as an early-stage construction project, represents an utterly trivial investment of its father’s
body mass compared to its mother’s. But, that doesn’t mean the female has automatically lost the game of chicken
before the moment of conception. Along with the one sperm that fertilized the egg, the male may have produced
several hundred million other sperms in the ejaculation, so that his total investment may be not dissimilar to the female.
38 Based on the premise that “we are much more reluctant to walk away from an ongoing enterprise in which we
have invested a lot than from one in which we have invested only a little,” which one of the following is the
easiest to do?
To burn the first chapter of your PhD dissertation draft after having worked on it for a few weeks
To rewrite the body of your PhD dissertation draft after having spent two whole years on it
To find another dissertation supervisor after having worked with your original supervisor for three years
To change your dissertation topic after working on it for one year and having finished three chapters
39 Which of the following statements is true?
When mating, the male invests much less than the female in total.
When mating, the total investment of the male is roughly the same as that of the female.
When mating, the female contributes much more than the male in total.
When mating, the male contributes much more than the female in total.
40 According to the passage, why has the female not automatically lost the game of chicken before the moment of
conception?
The male does not invest as little as we may think.
The female does not invest as little as we may think.
The female does not invest as much as we may think.
Neither of the male and the female invests as much as we think.