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.
The author’s tone in the passage is
best described as
The history of literature really began was the earliest of
the arts. Man danced for joy round his primitive camp fire after the defeat and
slaughter of his enemy. He yelled and shouted as he danced and gradually the
yells and shouts became coherent and caught the measure of the coherent and
caught the measure of the dance and thus the first war song was sung. As the
idea of God developed prayers were framed. The songs and prayers became
traditional and were repeated from one generation to another, each generation
adding something of its own. As man slowly grew more civilized, he was
compelled to invent some method of writing by three urgent necessities. There
were certain things that it was dangerous to forget and which, therefore, had
to be recorded. It was often necessary to communicate with person who were some
distance away and it was necessary to protect one’s property by making tools,
cattle and so on, in some distinctive manner. So man taught himself to write
and having learned to write purely for utilitarian reasons he used this new
method for preserving his war songs and his prayers. Of course, among these
ancient peoples, There were only a very few individuals who learned to write,
and only a few could read what was written.
The word ‘measure’ in the context of the passage means
In the early 1920's,
settlers came to Alaska looking for gold. They traveled by boat to the coastal
towns of Seward and Knik, and from there by land into the gold fields. The
trail they used to travel inland is known today as the lditarod Trail, one of the
National Historic Trails designated by the congress of the United States. The
Iditarod Trail quickly became a major thoroughfare in Alaska, as the mail and
supplies were carried across this trail. People also used it to get from place
to place, including the priests, ministers, and judges who had to travel
between villages down this trail was via god sled. Once the gold rush ended,
many gold-seekers went back to where they had come from, and suddenly there was
much less travel on the lditarod Trail. The introduction of the airplane in the
late 1920's meant dog teams were mode of transportation, of course airplane
carrying the mail and supplies, there was less need for land travel in general.
The final blow to the use of the dog teams was the appearance of snowmoniles.
By the mid 1960's most Alasknas didn't even know the lditarod Trail existed, or
that dos teens had played a crucial role in Alaska's early settlements. Dorothy
G.Page, a self-made historian, recognized how few people knew about the former
use of sled dogs as working animals and about the Iditarod Trail's role in
Alaska's colorful history. To she came up with the idea to have a god sled race
over the Iditarod Trail. She presented her idea to an enthusiastic musher, as
dog sled drivers are known, named Joe Redington, Sr. Soon the pages and the
Redintons were working together to promote the idea of the Iditarod race. Many
people worked to make the first Iditarod Trail Sled Dog Race a reality in 1967.
The Aurora Dog Mushers Club, along with men from the Adult Camp in Sutton,
helped clear years of overgrowth from the first nine miles of the Iditarod
Trail. To raise interest in the race, a $25,000 purse was offered, with Joe
Redington donating one acre of his land to help raise the funds. The short race,
approximately 27 miles long, was put on a second time in 1969. After these
first two successful races, the goal was to lengthen the race a little further
to the ghost town of Iditarod by 1973. However in 1972, the U.S. Army reopened
the trail as a winter exercise, and so in 1973, the decision was made to take
the race all the way to the city of Nome-over 1,000 miles. There were who
believed it could bot be done and that it wad crazy to send a bunch out into
vast, uninhabited Alaskan wilderness. But the race went! 22 mushers finished
that year, and to date over 400 people have completed it.
The primary purpose of
this passage is to
Educational planning should aim at meeting the educational needs
of the entire population of all age group. While the traditional structure of
education as a three layer hierarchy from the primary stage to the university
represents the core, we should not overlook the periphery which is equally
important. Under modern conditions, workers need to rewind, or renew their
enthusiasm, or strike out in a new direction, or improve their skills as much
as any university professor. The retired and the age have their needs as well.
Educational planning, in their words, should take care of the needs of
everyone.
Our structures of education have been built up on the
assumption that there is a terminal point to education. This basic defect has
become all the more harmful today. A UNESCO report entitled ‘learning to Be’
prepared by Edgar Faure and others in 1973 asserts that the education of
children must prepare the future adult for various forms of self – learning. A
viable education system of the future should consist of modules with different
kinds of functions serving a diversity of constituents. And performance, not
the period of study, should be the basis for credentials. The writing is
already on the wall.
In view of the fact that the significance of a commitment of
lifelong learning and lifetime education is being discussed only in recent years
even in educationally advanced countries, the possibility of the idea becoming
an integral part of educational thinking seems to be a far cry. For, to move in
that direction means such more than some simple rearrangement of the present
organization of education. But a good beginning can be made by developing Open
University programs for older learners of different categories and introducing
extension services in the conventional colleges and schools. Also these
institutions should learn to cooperate with the numerous community
organizations such as libraries. Museums, municipal recreational programs,
health services etc.
Which of the following is
most nearly the same in meaning as the word ‘meeting’ as used in the passage?
