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30 Cards in this Set
- Front
- Back
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Humans desire to explore and learn can sometimes be very dangerous, which is exemplified by the destruction of the Space Shuttles __________ and ________
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Columbia, Challenger
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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.
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carbon
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In order for life to exist, it requires a narrow range of environmental conditions, including pH, pressure, energy, and _________.
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temperature
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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 _________.
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snottities
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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.
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Antarctic
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Bacteria live 3.5 km underground within the Earth’s crust and gain their energy from _______ gas.
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methane
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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.
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75%, 25%
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________, a moon of Jupiter, is hypothesized to have a liquid ocean capable of supporting life under its thick ice caps.
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Europa
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SETI was the first scientific organization to look for evidence of ______________
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Extraterrestrial Intelligence
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The equation formulated in the 1960’s to estimate the possible number of intelligent civilizations in the Milky Way Galaxy is called the _______ equation.
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Drake
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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 _________.
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wobble
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________ telescopes were the first type of telescopes employed to look for the signals of communication from distant civilizations.
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Radio
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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.
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Voyager, 80,000
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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.
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self-annihilation
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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.
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humans
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The _______ flu pandemic killed between approximately 50 million people world-wide around the time of World War I.
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Spanish
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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.
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Bird flu, 150
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Because viruses cannot survive on their own and must take over a cell in order to reproduce, they are known as intracellular ___________.
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parasites
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The surface of a virus is covered with two types of ____________ , abbreviated H and N.
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proteins
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The human genome consists of more than _______ bases, which if stretched out would form a chain that would reach to the ____________
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3 billion, Sun
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The fact that all living organisms, from simple bacteria to human beings, use the same ____________ , points to the commonality of life on Earth.
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genetic code
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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.
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silica
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Biological membranes are composed of detergent-like molecules known as ______.
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phospholipids
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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 ________.
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transcription
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Influenza viruses belong to a group of viruses that use RNA instead of DNA for its genetic material. These viruses contain _______ pieces of RNA.
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eight
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All independent life forms must have a source of _______ to drive the chemical reactions for all their cellular activities.
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energy
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Bacteria have evolved enzymes that they use to cut up foreign DNA sequences. These enzymes are called _________
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restriction enzymes
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One of the first medicines to be developed through the use of genetic engineering was ______
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insulin
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In the United States, the percentages of genetically modified crops being cultivated for soybean and corn are ____, and ____ respectively.
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81%, 40%
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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 _______________
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European corn borer
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