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Bio 181, Lab #3.
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Exam of 3 pages for the course Master ASL! Unit 6 at Master ASL! Unit 6 (Bio 181, Lab #3.)
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Bio 181, Lab #3Evolution - correct answer-The process by which different kinds of living
organisms are thought it have developed & diversified from earlier forms
during the history of the earth.
The Vastness of Geologic Time - correct answer-Geologic data show that
Earth is about 4.6 billion years old.
The earliest signs of life are found in rocks about 3.4-3.8 billion years old.
Micro-evolution - correct answer-Genetic change in populations.
The genetic composition of generation A is different from that of generation B.
The population is not in Hardy-Weinberg equilibrium.
-there is mutation
-there is genetic drift
-there is natural selection
-there is non-random mating
-there is migration
-there is a small population size
Mutation - correct answer-Mutation is the key to our evolution, without
mutation & the variation it brings about, there could no evolution because
there would be no variation to act on. Mutation is the engine that drives
evolution.
-point mutation
-chromosomal mutations
-DNA rearrangements
-changes in numbers of chromosome sets
Genetic Drift - correct answer-A change in the gene pool of a population due
to chance.
-bottleneck effect
Natural Selection - correct answer-All organisms have descended with
modifications from common ancestors. The chief agent of modification is the
action of natural selection on individual variation.
-populations evolve, organisms do not
-individual variation
-heritable characteristics
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