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21 Cards in this Set
- Front
- Back
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In order for biological organisms to become fossilized, the bones and tissue of the organism must become __________
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Mineralized
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When biological tissues as bone is covered by moten rock or embedded in slit and replaced by minerals, the resulting fossil is known as a
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Replacement or compression
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When spiders or insects are trapped in the secretions of trees that turns to amber and fossilizes them, the resulting fossils are known as _______ fossils
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Resin
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A method of determining the relative age of a fossil based on how deep it is within the sedimentary rock layers of the earth's surface is known as _________.
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Stratigraphy
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A type of dating that determines the date of fossils by determining the ratio between parent elements and their decay products in the rock surrounding the fossil is know as ________ dating
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Radiometric
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A fossil that represents a particular time period is known as an __________ fossil
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Index
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In the Rocky Mountains of Canada there is an area that iss unusually rich in fossils, Known as the ________ ____________.
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Burgess Shale
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Evidence suggest that the Burgess Shale was once a lime stone cliff located in the ______.
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Sea or Ocean
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The fossils found in the Burgess Shale were dated to be rougly ______ years old
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550 Million
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The burgess shale fossils are of organisms that lived in a geological period known as the __________ period.
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Cambrian
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During the Cambrian explosion, all of the current animal _______ ________ involved
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Body plan
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The first multicellular organisms on Earth were _________.
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Sponges
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Ancestral flatworms were the first organisms to develop a _________ body plan
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Bilateral
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One hypothesis for the cause of the Cambrian explosion is that animals were able to evolve because a proper level of atomspheric _________ had been achieved
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Oxygen
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The huge explosion in evolution of new body plans documented in teh Burgess Shale is known as the ________ _________
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Cambrian Explosion
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How was the Burgess Shale formed and what does it contain?
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Look at study guide
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What are living fossils and what are two examples?
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Look at study guide
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How do the Lampsillis mussel and large mouth bass demonstrate an evolutionary arms race?
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Look at study guide
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How have bats and moths evolved due to an evolutionary arms race?
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Look at study guide
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How has an evolutionary arms race determined the abilities of the cheetah and gazelle?
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Look at study guide
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List and briefly define the 5 types of fossils
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Look at study guide
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