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15 Cards in this Set
- Front
- Back
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The ________ theory describes how the universe was formed about 13.7 billion years ago.
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Big Bang
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The amount of oxygen in our current atmosphere is a result of billions of years of photosynthesis by ___________.
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cynanobacteria
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Three basic characteristics of life include the abilities to use energy, ______, and _______.
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reproduce, evolve
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All matter in the universe, including the matter in your body, comes from the inside of ______.
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stars
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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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One of the hypotheses for the Cambrian explosion was an increase in the Earth’s _______ concentration, which promoted the evolution or larger body forms.
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oxygen
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__________ _________ is the universal mechanism to insure individual uniqueness.
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Sexual reproduction
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Humans are nothing more than a collection of molecules composed of hydrogen, ____________, and ___________, yet we are one of the most complex creatures on Earth.
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oxygen, carbon: any order
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The protein, which acts like cellular “glue” to hold cells together, is called _________. This protein was first used by the group of animals known scientifically as ________ .
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collagen, Porifera
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To coordinate the motion of muscles, the cnidarians a simple network of _______ that allow the muscle fibers to communicate using a combination of electrical impulses and chemical signals.
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nerve cells
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In Lewis Carroll’s Through the Looking-Glass, . Alice asked the ________ why they did not seem to be going anywhere during their race. This scene is a good analogy for the Evolutionary Arms race, in which neither participant can get anywhere, but must keep evolving in order to just keep up.
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Red Queen
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Scientists have shown that at some point in evolution, ___________ cells took up residence in eukaryotic cells to become the first organelles through a process know as ______________.
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prokaryotes; endosymbiosis
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Even though we are one of the most complex organisms on the planet, less than ____ percent of the human genome is used to encode functional proteins.
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2
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Scientists have found that there are a small group of genes known as the ______ genes which are responsible for directing the body pattern formation in all animals.
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homeobox
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A brain’s complexity results mainly from the types and numbers of _________ that each nerve cell has with other nerve cells.
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connections
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