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Biology 101 Exam 4 Lecture 4 Questions with Correct Answers
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Biology 101 Exam 4 Lecture 4 Questions with Correct Answers
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Biology 101 Exam 4 Lecture 4 Questionswith Correct Answers
Processes affecting rise and fall of major groups over time - Answer-1) Adaptive
radiation
2) Extinction
3) Continental drift
Processes affecting distribution of taxa - Answer-1) Biogeography
2) Determinants of species distribution
Macroevolution - Answer-evolution on a grand scale-what we see when we look at the
over-arching history of life: stability, change, lineages arising, and extinction.
(Mutation + Gene Flow + Genetic Drift + Natural Selection) + 3.8 Billion Years = -
Answer-Macroevolution
Which hypotheses have to do with how earth changes over time? - Answer-
Catastrophism and Uniformitarianism
What is gradualism? - Answer-big changes reflect slow steady change
speciation - Answer-accumulation of many small changes
What does speciation support? - Answer-studies of population genetics
- Answer-
What concepts help determine how fast speciation is? - Answer-1) gradualism
2) Punctuated Equilibrium
What is Punctuated Equilibrium? - Answer-long periods of stasis + short periods of rapid
change
What does Punctuated Equilibrium support? - Answer-1) single gene/chromosome
changes (resistance to antibiotics and polyploidy)
2) Fossil record evidence (awkward though because the fossil record is not complete)
What is Adaptive Radiation? - Answer--a process in which organisms diversify rapidly
into a multitude of new forms, particularly when a change in the environment makes
new resources available, creates new challenges and opens environmental niches.
-Relatively rapid increase in new species
-on islands, or over time
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