Fleas are perfectly designed by
nature to feast on anything containing blood. Like a shark in the water or a
wolf in the woods, fleas are ideally equipped to do what they do, making them
very difficult to defeat. The bodies of these tiny parasites are extremely
hardy and well-suited for their job.
A flea has a very hard exoskeleton,
which means the body is covered by a tough, tile-like plate called a sclerite.
Because of these plates, fleas are almost impossible to squish. The
exoskeletons of fleas are also waterproof of fleas are also waterproof and shock
resistant, and therefore fleas are highly resistant to the sprays and chemicals
used to kill them.
Little spines are attached to his
plate. The spine the flea scurries through an animal’s fur in – search of
grooming pet tries to pull a flea off through the hair coat, these spines will
extend and stick to the fur like Velcro.
Fleas are some of the best jumpers
in the natural world. A flea can jump seven inches, or 150 times its own
length, either vertically or horizontally. An equivalent jump for a person
would be 555 feet, the height of the Washington Monument. Fleas can jump 30,000
times in a row without stopping, and they are able to accelerate through the
air at an incredibly high rate – a rate which is over ten times what humans can
withstand in an airplane.
Fleas have very long rear legs with
huge thigh muscles and multiple joints. When they get ready to jump. They fold their
long legs up and crouch like a runner on a staring block. Several of their
joints contain a protein called resilin, which helps catapult fleas into the
air as they jump, similar to the way a rubber band provides momentum to a
slingshot. Outward facing claws on the bottom of their legs grip anything they
touch when they land.
The adult female flea mates after
her first blood meal and begins producing eggs in just 1 to 2 days. One flea
can lay up to 50 eggs in one day and over 2,000 in her lifetime. Flea eggs can
be seen with the naked eye, but they are about the size of a grain of salt. Shortly
after being laid, the eggs begin to transform into cocoons. In the cocoon
state, fleas are fully developed adults, and will hatch immediately if
conditions are favorable. Fleas can detect warmth, movement, and carbon dioxide
in exhaled breath, and these three factors stimulate them to emerge as new
adults. If the flea does not detect appropriate conditions, it can remain
dormant in the cocoon state for extended periods. Under ideal conditions, the
entire life cycle may only take 3 weeks, so in no time at all, pets and homes
can become infested.
Because of these characteristics,
fleas are intimidating opponents. The best way to control fleas, therefore, is
to take steps to prevent an infestation from ever occurring.
According to the passage, which of
the following statements is true?
At the time Jane Austen’s novels
were published – between 1811 and 1818 – English literature was not part of any
academic curriculum. In addition, fiction was under strenuous attack. Certain
religious and political groups felt novels had the power to make so-called
immoral characters so interesting that young readers would identify with them;
these groups also considered novels to be of little practical use. Even
Coleridge, certainly no literary reactionary, spoke for many when the asserted
that “novel-reading occasions the destruction of the mind’s powers.”
These attitudes towards novels help
explain why Austen received little attention from early nineteenth-century
literary cities. (In any case a novelist published anonymously, as Austen was,
would not be likely to receive much critical attention.) The literary response
that was accorded to her, however, was often as incisive as twentieth-century
criticism. In his attack in 1816 on novelistic portrayals “outside of ordinary experience,”
for example. Scott made an insightful remark about the merits of Austen’s
fiction.
Her novels, wrote Scott, “present to
the reader an accurate and exact picture of ordinary everyday people and
places, reminiscent of seventeenth-century Flemish painting.” Scott did not use
the word ‘realism’, but he undoubtedly used a standard of realistic probability
in judging novels. The critic Whately did not use the word ‘realism’, either,
but he expressed agreement with Scott’s evaluation, and went on to suggest the possibilities
for moral instruction in what we have called Austen’s ‘realistic method’ her
characters, wrote Whately, are persuasive agents for moral truth since they are
ordinary persons “so clearly evoked that we feel an interest in their fate as
if it were our own.” Moral instruction, explained Whately, is more likely to be
effective when conveyed through recongnizably human and interesting characters
than when imparted by a sermonizing narrator. Whitely especially praised Austen’s
ability to create character who “mingle goodness and villainy, weakness and
virtue, as in life they are always mingled. “Whitely concluded his remarks by
comparing Austen’s art of characterization to Dickens’, starting his preference
for Austen’s.
Yet, the response of
nineteenth-century literary critics to Austen was not always so laudatory, and
often anticipated the reservations of twentieth-century literary critics. An
example of such a response was Lewes complaint in 1859 that Austen’s range of
subject and characters was too narrow. Praising her verisimilitude, Lewes added
that, nonetheless her focus was too often only upon the unlofty and the
commonplace. (Twentieth-century Marxists, on the other hand, were to complain
about what they saw as her exclusive emphasis on a lofty upper middle class.)
In any case having being rescued by literary critics from neglect and indeed
gradually lionized by them, Austen steadily reached, by the mid-nineteenth
century, the enviable pinnacle of being considered controversial.
The passage suggest that twentieth-century
Marxists would have admired Jane Austen’s novels more if the novels, as the
Marxists understood them, had
