DNA
.... two specific functions: to provide foe
protein synthesis, and hence the growth and development of the organism and to
furnish all descendants with protein-synthesis and hence the growth and
development of the organism. So all living things on plant Earth contains the
genetic material DNA and the structure of a DNA molecule or combination of DNA
molecules determines the shape, form, and function of the offspring.
2)The term "genetic technology"(or genetic engineering) is the modification of
the genetic p .....
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Dolphins
.... for the small amount of
oil that can be extracted from their body. This oil is used to lubricate small
parts in watches. Cheaper oils have been found, so dolphins are not hunted for
this reason anymore. Dolphins can be caught in tuna nets by accident. Since
dolphins have to breath at the surface they drown in tuna nets. It is estimated
that 4.8 million dolphins were killed in tuna nets from 1959 to 1972. Under
pressure from animal rights activists tuna consumers will not accept tuna from
canners that do .....
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Salt Pollution
.... in Canada.
Salt is used to keep snow and ice from bonding to the pavement and to
allow snowplows to remove. When salt is applied to ice and snow it creates a
brine that has a lower freezing temperature than the surrounding ice or snow.
Salt is the ideal deicing material because it is:
•the least expensive deicer
•easy to spread
•easy to store and handle
•readily available
•non-toxic
•harmless to skin and clothing
Salt pollution is broken into two main groups. Water, which includes
the ef .....
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Effects Of Asperguillus
.... often use a lung biopsy. Blood culture
techniques fail because antibody responses in immunocompromised patients give
false indications of infection. Identification of a source of the fungi is
difficult, but can be determined through careful evaluation of each additional
case. A better solution is to develop protected areas for high risk patients.
These protected areas would have special air filtration systems that direct air
flow only in certain directions. The doors to these rooms would have vacuum
sea .....
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The Effects Of Foreign Species Introduction On An Ecosystem
.... has found its ecological niche however, balance begins to
restore itself.
When the biodiversity in the ecosystem is reduced, the ability of the
ecosystem to grow, or the biotic potential, is as well reduced. More species
residing in an ecosystem which depend on each other allows for a greater chance
of survival and perpetuation. This may occur for several reasons, for example a
bee and a flower. The bee requires the pollen of the flower to make its honey.
However, while gathering the pollen from .....
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The Big Bang
.... have observed.
The Steady State model says that the universe does not evolve or change in
time. There was no beginning in the past, nor will there be change in the
future. This model assumes the perfect cosmological principle. This principle
says that the universe is the same everywhere on the large scale, at all times.2
It maintains the same average density of matter forever.
There are observational evidences found that can prove the Big Bang model
is more reasonable than the Steady State mo .....
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Evolution From A Molecular Perspective
.... reconstruct an exact copy of, or clone, that person? These are all
issues that will have to be dealt with in the near future, but for now we need
only concern ourselves with the objective observation of these proteins in our
attempt to explain our ever mysterious origin. As humans, we are the first
creatures to question exactly where we came from and how we got here. Some
cling to religious creationism as a means, while others embrace the evolutionary
theory. As of now, and possibly fore .....
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Evolution Of Immunity And The Invertebrates
.... immunologists studied the immune defenses of past and
current creatures. They gained further insight into how immunity works.
The most basic requirement of an immune system is to distinguish between
one's own cells and "non-self" cells. The second job is to eliminate the non-
self cells. When a foreign object enters the body, several things happen. Blood
stops flowing, the immunity system begins to eliminate unwanted microbes with
phagocytic white blood cells. This defensive mechanism is possessed by a .....
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Essay On Evolution
.... that contain
less than 100 individuals, but in large populations drift may have no
significant effect on the population. Another mechanism is gene flow which is
when a population may gain or lose alleles by the migration of fertile
individuals between populations. This may cause the allele frequencies in a gene
pool to change and allow the organism to evolve. The most obvious mechanism
would have to be mutation that arises in the gene pool of a population or
individual. It is also the original source .....
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We Are Not Alone
.... Just north of his position flying at an altitude of 9,500 feet and an
unprecedented airspeed of 1,700 mph he spotted nine circular aircraft flying in
formation. According to his estimate the aircraft were approximately the size
of a DC-4 airliner ( Jackson 4).
This account was the first sighting to ever receive a great deal of
media attention. This sighting gave birth to the phrase "flying Saucer" coined
by a reporter named Bill Begrette. Although not the first UFO sighting in
history, Kennet .....
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Wind Tunnels
.... etc.)or
a model of it. The object in the wind tunnel is fixed and placed in the test
section of the tunnel and instruments are placed on the model to record the
aerodynamic forces acting on the model.
Types of Wind Tunnels
There are four basic types of wind tunnels. Which are low subsonic,
transonic, supersonic, and hypersonic. The wind tunnels are classified by the
amount of speed they can produce. The subsonic has a speed lower then the speed
of sound. The transonic has a speed which is abo .....
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Extinction Of Dinosaurs
.... ate dinosaur eggs, and therefore caused the dinosaurs' birth rate to drop.
The birth rate became smaller than the death rate and the dinosaurs died out.
This, however, is not a plausible scenario. This would only account for the
dinosaurs, but not all the other creatures of that time. Paleontologists needed
to come up with a more plausible and devastating theory that would include the
other creatures that died out 65 million years ago.
There have been several major theories that have come about that .....
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B E C: The New Phase Of Matter
.... by using laser beams. The hardware needed to create the BEC is a
bargain at $50,000 to $1000,000 which makes it accessible to physics labs around
the world.
The next step is to test the new phase of matter. We do not know yet if
it absorbs, reflects,or refracts light. BEC is related to superconductivity and
may unlock some mysteries of why some minerals are able to conduct electricity
without resistance. The asymmetrical pattern of BEC is is thought by some
astrophysicists to explain the bumpy di .....
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Black Holes
.... But where lies the “point of
no return” at which any matter or energy is doomed to disappear from the visible
universe?
The black hole's surface is known as the event horizon. Behind this
horizon, the inward pull of gravity is overwhelming and no information about the
black hole's interior can escape to the outer universe. Applying the Einstein
Field Equations to collapsing stars, Kurt Schwarzschild discovered the critical
radius for a given mass at which matter would collapse into an infinitely .....
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Carbon
.... Symbol = C
Atomic Number = 6
Atomic Weight = 12.011
Density at 68 Degrees F = 1.88-3.53
Boiling Point = 8,721 degrees F
Melting Point = 6,420 degrees F
.....
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