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30 Cards in this Set

  • Front
  • Back
Humans desire to explore and learn can sometimes be very dangerous, which is exemplified by the destruction of the Space Shuttles __________ and ________
Columbia, Challenger
The basis of life on Earth is in the form of the element _________ and as this element is abundant throughout the Universe it also may serve as the basis of life on other planets.
In order for life to exist, it requires a narrow range of environmental conditions, including pH, pressure, energy, and _________.
The inhospitable caves known as Caeva De Willa Luiz in Mexico are home to bacteria which form large colonies that drip from the ceilings. These colonies are called _________.
Lake Vostok is a large body of water which is located about 4,000 m below the ___________ ice sheets and contains abundant life which can tolerate the extreme cold.
Bacteria live 3.5 km underground within the Earth’s crust and gain their energy from _______ gas.
In a recent poll of scientists at a European Space Agency conference found that _______ of them believe that life once existed on Mars and ______ believe it supports life today.
75%, 25%
________, a moon of Jupiter, is hypothesized to have a liquid ocean capable of supporting life under its thick ice caps.
SETI was the first scientific organization to look for evidence of ______________
Extraterrestrial Intelligence
The equation formulated in the 1960’s to estimate the possible number of intelligent civilizations in the Milky Way Galaxy is called the _______ equation.
Although it is currently impossible to see distant planets around other stars using telescopes, we can detect them because the planets exert a gravitational pull on the stars that they orbit. This pull causes the star to _________.
________ telescopes were the first type of telescopes employed to look for the signals of communication from distant civilizations.
The ________ space crafts were both launched in the 1970’s to explore our solar system, but although they have been traveling for more than 30 years, it would take another ________ years at the speed of light for them to reach the next closest star.
Voyager, 80,000
Some scientists believe that intelligent life may not exist in the Milky Way Galaxy because of the probability of ___________ for a technologically advanced civilizations is rather high.
One argument for the presence of intelligent life elsewhere in our galaxy assumes that because _________ evolved, the conditions of the universe must be suitable for intelligent life to evolve elsewhere.
The _______ flu pandemic killed between approximately 50 million people world-wide around the time of World War I.
If the H5N1 strain of flu known as _____ were to become a pandemic, it is estimated to kill between 7.4 and _________ million people world-wide.
Bird flu, 150
Because viruses cannot survive on their own and must take over a cell in order to reproduce, they are known as intracellular ___________.
The surface of a virus is covered with two types of ____________ , abbreviated H and N.
The human genome consists of more than _______ bases, which if stretched out would form a chain that would reach to the ____________
3 billion, Sun
The fact that all living organisms, from simple bacteria to human beings, use the same ____________ , points to the commonality of life on Earth.
genetic code
Most scientists predict that almost all extraterrestrial life forms would be carbon based, although it is conceivable that some life forms could be _____ based, because it too is capable of forming four chemical bonds.
Biological membranes are composed of detergent-like molecules known as ______.
During protein synthesis, a short segment of the DNA corresponding to the region of interest is copied into another type of nucleic acid known as RNA. This process is known as ________.
Influenza viruses belong to a group of viruses that use RNA instead of DNA for its genetic material. These viruses contain _______ pieces of RNA.
All independent life forms must have a source of _______ to drive the chemical reactions for all their cellular activities.
Bacteria have evolved enzymes that they use to cut up foreign DNA sequences. These enzymes are called _________
restriction enzymes
One of the first medicines to be developed through the use of genetic engineering was ______
In the United States, the percentages of genetically modified crops being cultivated for soybean and corn are ____, and ____ respectively.
81%, 40%
A gene from the bacterium, Bacillus thuringiensis, has been inserted into corn because this gene produces a toxin that can kill the corn pest called the _______________
European corn borer