Chromosome Probes At The University Of Toronto
.... who have a family history of chromosomal abnormalities. Prenatal
tests using Willard's probes would be much simpler and faster to perform
and could be available to all pregnant women who wish to take advantage of
the technology.
Current prenatal testing involves growing fetal cells in vitro and
examining them, over one or two months, to see if there are two copies of
a particular chromosome, which is normal, or one or three, which is
abnormal. A test using Willard's probes would require only a few c .....
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David Levinson: Seasons' Of A Man's Life
.... beliefs) and major
events or turning points in their lives.
Levinson's concept of life structure (the men's socio-cultural world,
their participation in their world and various aspects of themselves) is the
major component in Levinson's theory. The life structure for each person
evolves through the developmental stages as people's age.
Two key concepts in Levinson's model are the stable period and the
transitional period in a person's development. The stable period is the time
when .....
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Classification
.... are only distantly related.
Carolus Linnaeus is probably the single most dominant figure in systematic
classification. Born in 1707, he had a mind that was orderly to the extreme.
People sent him plants from all over the world, and he would devise a way
to relate them. At the age of thirty-two he was the author of fourteen
botanical works. His two most famous were Genera Plantarum, developing an
artificial sexual system, and Species Plantarum, a famous work where he
named and classified every plant kn .....
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The Grasslands
.... the interior parts of most continents. The world’s grasslands
are vast areas covered with grass and leafy plants. They generally have a dry
climate, little vegetation, and most grasslands receive only about twenty to
thirty inches of rain each year, with most of it coming in the same season.
Some grasslands may even receive up to thirty to forty inches of rain a year!
For example, since the grasslands of the United States have hot summers and mild
winters, most of the rain comes from the summer thunder .....
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Concept Of Species
.... groups that the
authors of the BSC worked with. (Mayr is an ornithologist & Dobzhansky has
worked mainly with Drosophila). More importantly Sexual reproduction is
the predominate form of reproduction in these groups. It is not
coincidental that the BSC is less widely used amongst botanists.
Terrestrial plants exhibit much more greater diversity in their mode of
reproduction than vertebrates and insects.
There has been many criticisms of the BSC in its theoretical validity and
practical utility. For exa .....
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Evolution
.... 41
PUNCTUATED EQUILIBRIUM .................................... 43
VALUE/LIMITATIONS: THE THEORY OF BIOLOGICAL EVOLUTION .... 45
ALTERNATE EXPLANATIONS OF BEING ........................... 47
CONCLUSIONS ............................................... 48
INTRODUCTION
Theories explaining biological evolution have been bandied about since
the ancient Greeks, but it was not until the Enlightment of the 18th
century that widespread acceptance and development of this .....
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The Human Eye In Space
.... bluish cast..... I could
detect individual houses and streets in the low humidity and cloudless
areas such as the Himalaya mountain area.... I saw a steam locomotive by
seeing the smoke first..... I also saw the wake of a boat on a large river
in the Burma-India area... and a bright orange light from the British oil
refinery to the south of the city (Perth,Australia.)"
The above observation was made by Gordon Cooper in Faith 7 [1963] and
which generated much skepticism in the light of the thesis .....
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Ocean Pollution In The Third World
.... dumping waste in
the water and this is probably the biggest threat to our oceans because of
people throw stuff in our oceans. This question was also good to ask for this
topic because this question has a lot of answers and solutions for it like what
can people in the First World do to help the Third World people out. The books
and my resources found many ways to finish off this problem. I also found some
insight to this problem. The resource which helped me a lot was the internet
because it had the mo .....
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The Koala
.... joey (baby koala) is born, it is no longer than 2 cm and
weighs no more than a 1/2 gram. The joey stays in its mother's pouch for 5-7
months. The term "joey² is used when you are talking about a baby marsupial.
The mother gives "pap² to the joey, a liquid from the caecum (which is similar
to the human organ, appendix.) This is thought to give the joey the ability to
eat only eucalyptus leaves. When the joey emerges from the pouch, it clings to
its mother for another seven months. The joey stays wit .....
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The Dust-Cloud Hypothesis
.... very hot and to glow brightly.
The newly born sun began to heat up the swirling eddy of gas and dust that
was to become the earth. The gas expanded, and some of it flowed away into
space. The dust that remained behind then collected together because of
gravity. Although the shrinking earth generated a lot of heat, most of
this heat was lost into space. Therefore, the original earth was most
likely solid, not molten.
This hypothesis was developed by a scientest, Harold C. Urey in 1952. It is
also .....
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Holograms
.... in 3-D. You can look around
objects, too -if the apple is blocking the view of an orange behind it,
you can just move your head to one side. The apple seems to "move" out of
the way so you can see the orange or even the back of the apple. If that
seems a bit obvious, just try looking behind something in a regular
photograph! You can't, because the photograph can't reproduce the
infinitely complicated waves of light reflected by objects; the lens of a
camera can only focus those waves into a flat, 2-D .....
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Mitochondrion
.... cell. Other organelles will find the ATP and break off the phosphates full
of ready-to-use energy.Once the adenosine has been stripped of phosphates it
will travel back to the mitochondrion to be reloaded with new phosphates.
.....
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Hurricanes
.... the air soaring upwards in the thunderheads. The air begins
swirling around the storm center, for the same reason that the air swirls
around a tornado center.
As this air swirls in over the sea surface, it soaks up more and more
water vapour. At the storm center, this new supply of water vapor gets
pulled into the thunderhead updrafts, releasing still more energy as the
water vapor condenses. This makes the updrafts rise faster, pulling in
even larger amounts of air and water vapor from the storm' .....
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The Great Imposters
.... as others. So clever are their disguises that you've probably
never known you were being fooled by spiders impersonating ants, squirrels
that look like shrews, worms copying sea anemones, and roaches imitating
ladybugs. There are even animals that look like themselves, which can also
be a form of impersonation. The phenomenon of mimicry, as it's called
by biologists, was first noted in the mid-1800s by an English naturalist,
Henry W. Bates. Watching butterflies in the forests of Brazil, Bates
disco .....
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Skylab
.... however, this positioning caused workshop temperatures to rise
to 126 degrees F. The launch of Skylab 2 was postponed 10 days while NASA
engineers developed procedures and trained the crew to make the workshop
habitable. At the same time, engineers "rolled" Skylab to lower the temperature
of the workshop.
Skylab's 2nd manned mission - May 25th to June 22nd
Astronauts;
Charles Conrad, Jr.
Paul J. Weitz
Joseph P. Kerwin
The crew meats with Skylab on the fifth orbit. After making .....
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