BIO 2 FINAL EXAM- PALMTAG FGCU
QUESTIONS AND CORRECT ANSWERS |
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What are the key features of natural selection?
✓ -:- genetic variation
✓ over production of offspring
✓ struggle for existence
Acquired vs. Inherited traits
✓ -:- Acquired- changes made to body that don't affect DNA
Inherited- traits derived from DNA
What was Darwin's and Wallace's contribution to science?
✓ -:- mechanism for which evolution occurs, evolution with natural
selection
What is the role that populations play in natural selection and evolution?
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✓ -:- natural selection and evolution occur at the population level
What is Hardy Weinburg equilibrium?
✓ -:- p^2 + 2pq+ q^2 =1
-If a population is at equilibrium, (percentages don't change)
-No genetic drift, gene flow, no natural selection, no new alleles, no sexual selection
-Genetic drift, gene flow, and natural selection cause most evolutionary change
Genetic Drift
✓ -:- Chance events cause the allele frequency of a small population to
fluctuate unpredictably
-Founder Effect, small sub population goes somewhere else
-Bottleneck Effect, natural disaster, sudden change in environment
Gene Flow
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✓ -:- The addition or subtraction of alleles due to the movement of
reproductively viable individuals
Natural Selection
✓ -:- Alleles that enhance survival and reproduction increase over time
Biological Species Concept
✓ -:- -if it can breed and produce offspring then it's the same species
-No gene flow
Morphological Species Concept
✓ -:- Morphology, body shape, structural features
-gene flow is unknown
Ecological Species Concept
✓ -:- Defines species based on "ecological niche"
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