Biology 122 Exam 1 Questions With Correct Answers

Biology 122 Exam 1 Questions With
Correct Answers

The Linnaeus classification system grouped organisms by
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_______________. - CORRECT ANSWER✔✔-Increasingly more general | | | | | |



categories


Prior to the work of Lyell and Darwin, the prevailing belief was that
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Earth is ___________. - CORRECT ANSWER✔✔-a few thousand years
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old, and populations are unchanging.
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In Darwin's tree of life, each fork in the tree represents _____________.
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|- CORRECT ANSWER✔✔-the most recent common ancestor of the
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subsequent branches. |




A farmer uses triazine herbicide to control pigweed in his field. For the
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first few years, the triazine works well and almost all the pigweed dies;
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but after several years, the farmer sees more and more pigweed. Which
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of these statements explains why the pigweed reappeared?
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(a) The herbicide company lost its triazine formula and started selling
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poor-quality triazine. |

,(b) Natural Selection caused the pigweed to mutate, creating a new
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triazine-resistant species | |




(c) Triazine-resistant pigweed has less-efficient photosynthesis
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metabolism
(d) Triazine-resistant weeds were more likely to survive and reproduce. -
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CORRECT ANSWER✔✔-(d) Triazine-resistant weeds were more likely to
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survive and reproduce.
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Gradualism: - CORRECT ANSWER✔✔-an idea that states geologic
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processes happen very slowly (i.e. sea level flux, erosion)
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artificial selection - CORRECT ANSWER✔✔-selection guided by humans
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Acquired - CORRECT ANSWER✔✔-the type of trait that cannot be
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passed on genetically (think of our favorite meat monster, Dwayne "The
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Rock" "Rocky" "DJ" "Flex Kavana" "The Brahma Bull" "The People's
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Champion" "Dewey" Johnson and his big muscles and what his kid
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might look like)
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Immutable - CORRECT ANSWER✔✔-Unable to change
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Darwin's Book - CORRECT ANSWER✔✔-On the Origin of Species by
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Means of Natural Selection
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, Extant - CORRECT ANSWER✔✔-an organism that is living today
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Homologies - CORRECT ANSWER✔✔-anatomical traits that are a result
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of common ancestry
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Natural Selection - CORRECT ANSWER✔✔-The mechanism of evolution.
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The only mechanism for changes in allele frequency that ALWAYS results
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in adaptive evolution
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Scala Naturae - CORRECT ANSWER✔✔-An attempt by Aristotle to
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organize life on Earth. | | |




Populations - CORRECT ANSWER✔✔-The smallest unit of selection
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Intron - CORRECT ANSWER✔✔-Part of DNA that does NOT leave the
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nucleus when mRNA is completed
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Genetic Drift - CORRECT ANSWER✔✔-the mechanism responsible for
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there being waaaaay too many nipples on Tristan de Cunha (at least
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compared to mainland populations)
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Hybrid Zone - CORRECT ANSWER✔✔-
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