BSC2005 LaunchPad Chapter 17 Quiz

25 July 2022
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question
Which of the following statements is FALSE?
answer
Once an organism is classified, the classification cannot change.
question
The biogeography of a species can help explain all of the following EXCEPT:
answer
All of the above can be determined from studying the biogeography of a species.
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All of the above can be determined from studying the biogeography of a species.
answer
all of the above
question
An animal with a rigid backbone would belong to which phylum?
answer
chordata
question
What is the best explanation as to why early penguin fossils have been found in New Zealand?
answer
New Zealand was once much closer to Antarctica.
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Which of the following are used to develop a phylogenetic tree?
answer
All of the above are used to develop a phylogenetic tree.
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Which of the following factors is the most likely to affect the geographical distribution of a particular species?
answer
plate tectonics
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On a phylogenetic tree, a _______ represents the most recent common ancestor shared by the organisms above it.
answer
node
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If two organisms are placed in the same phylum, which of the following statements is TRUE?
answer
They have some major body structures in common.
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According to scientists, approximately _______ species exist on Earth today.
answer
5-30 million
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The Miller-Urey experiment was important because it showed __________.
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that is was possible to form organic molecules from inorganic molecules Correct. d. a and c e. all of the above
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The first eukaryotic organisms on Earth were _______.
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green algae
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Scientists can use __________ to determine the age of an igneous rock surrounding a fossil.
answer
radiometric dating
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When 50-90% of all species die off rapidly, this is called __________.
answer
mass extinction
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If you found a fossil of an animal that was found in many areas of Gondwana, on which of the following continents might you expect to find its descendants?
answer
South America
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Why are genes from ribosomal RNA (rRNA) used to compare genetic sequences between species?
answer
They are found in all living organisms.