题目内容
（请给出正确答案）
A.mosquito
B.flea
C.Midge
D.Gadfly
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更多“which inset larva can live in water body”相关的问题
A.cysticercus
B.egg
C.larva
D.oncosphere
E.adult
A、Toxocara canis
B、Pagumogonimus Skrjabini
C、Ancylostoma duodenale
D、Angiostrongylus cantonensis
A．Adult female wasps are capable of storing sperm.
B．Female wasps lay their eggs in the larvae of other insects.
C．The adult female wasp can be fertilized by a male that was hatched in the same larva as herself.
D．So few male wasps are produced that extinction is almost certain.
A．Ⅰ only
B．Ⅱ only
C．Ⅰ and Ⅱ only
D．Ⅰ and Ⅲ only
E．Ⅰ,Ⅱ, and Ⅲ
What unusual or unique biological train led to the remarkable diversification and
unchallenged success of the ants for ever 50 million years？ The answer appears to be
that they were the first group of predatory ensocial insects that both lived and foraged
primarily in the soil and in rotting vegetation on the ground. Eusocial refers to a form
(5) of insect society characterized by specialization of tasks and cooperative care of the
young; it is rare among insects. Richly organized colonies of the land made possible
by eusociality enjoy several key advantages over solitary individuals.
Under most circumstances groups of workers arc better able to forage for food and
defend the nest, because they can switch from individual to group response and back
(10) again swiftly and according to need. When a food object or nest intruder is too large for
one individual to handle, nestmates can be quickly assembled by alarm or recruitment
signals. Equally important is the fact that the execution of multiple-step tasks is
accomplished in a series-parallel sequence. That is, individual ants can specialize in
particular steps, moving from one object (such as a larva to be fed) to another (a second
(15) larva to be fed). They do not need to carry each task to completion from start to finish.
for example, to check the larva first, then collect the food, then feed the larva. Hence, if
each link in the chain has many workers in attendance, a senes directed at any particular
object is less likely to fail. Moreover, ants specializing in particular labor categories
typically constitute a caste specialized by age or body form. or both. There has bees some
(20) documentation of the superiority in performance and net energetic yield of various castes
for their modal tasks, although careful experimental studies are still relatively few.
What makes ants unusual in the company of eusocial insects is the fact that they are
the only eusocial predators (predators are animals that capture and feed on other animals)
occupying the soil and ground litter. The eusocial termites live in the same places as ants
and also have wingless workers, but they feed almost exclusively on dead vegetation.
Which of the following questions does the passage primarily answer？
A．How do individual ants adapt to specialized tasks？
B．What are the differences between social and solitary insects？
C．Why are ants predators？
D．Why have ants been able to thrive for such a long time？
Since Fisher's time, it has been realized that genes can sometimes influence the chromosome or gamete in which they find themselves so that the gamete will be more likely to participate in fertilization. If such a gene occurs on a sex-determining (X or Y) chromosome, then highly aberrant sex ratios can occur. But more immediately relevant to game theory are the sex ratios in certain parasitic wasp species that have a large excess of females. In these species, fertilized eggs develop into females and unfertilized eggs into males. A female stores sperm and can determine the sex of each egg she lays by fertilizing it or leaving it unfertilized. By Fisher's argument, it should still pay a female to produce equal numbers of sons and daughters. Hamilton, noting that the eggs develop within their host--the larva of another insect--and that the newly emerged adult wasps mate immediately and disperse, offered a remarkably cogent analysis. Since only one female usually eggs in a given larva, it would pay her to produce one male only, because this one could fertilize all his sisters on emergence. Like Fisher, Hamilton looked for an evolutionarily stable strategy, but he went a step further in recognizing that he was looking strategy.
What can we know about the scientists Fisher and Hamilton from the passage？
A．They both made contribution to the mathematical theory of games.
B．They both sought an explanation of why certain sex ratios exist and remain stable
C．The former stressed the maximization and the latter emphasized the optimization.
D．They both inherited the insight of the "group, selection" argument.
A.filariform larva
B.fresh egg
C.rhabditiform larva
D.embryonated egg
E.microfilaria
A、Protein Kinase A
B、Protein Kinase B
C、Phospholipase Ca
D、Phospholipase Cb
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