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Bio 2 Final Exam- Palmtag FGCU with complete solutions 2024_2025
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Bio 2 Final Exam- Palmtag FGCU with complete solutions 2024_2025
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Bio 2 Final Exam- Palmtag FGCU withcomplete solutions 2024/2025
What are the key features of natural selection? - ANSWER- genetic variation
over production of offspring
struggle for existence
Acquired vs. Inherited traits - ANSWER- 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? - ANSWER-
mechanism for which evolution occurs, evolution with natural selection
What is the role that populations play in natural selection and evolution? -
ANSWER- natural selection and evolution occur at the population level
What is Hardy Weinburg equilibrium? - ANSWER- 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 - ANSWER- 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 - ANSWER- The addition or subtraction of alleles due to the movement
of reproductively viable individuals
Natural Selection - ANSWER- Alleles that enhance survival and reproduction
increase over time
Biological Species Concept - ANSWER- -if it can breed and produce offspring
then it's the same species
-No gene flow
Morphological Species Concept - ANSWER- Morphology, body shape, structural
features
-gene flow is unknown
Ecological Species Concept - ANSWER- Defines species based on "ecological
niche"
Two species may maintain different ecological niches and/or behavior, and/or
morphology yet occasionally interbreed (gene flow)
Pre zygotic barriers - ANSWER- -no zygote is formed
-temporal isolation
-mechanical isolation
-gametic isolation
Post zygotic barriers - ANSWER- -Zygote is formed
-Hybrid Breakdown
-Reduced hybrid viability
-Reduced hybrid fertility
Sympatric speciation - ANSWER- separated by behavior
Allopatric Speciation - ANSWER- one population is physically separated from
another
Polyploidy - ANSWER- -error in meiosis
-can lead to new species
-prevalent in plant population
What is some evidence for endosymbiosis? - ANSWER- -Mitochondria replicate
similar to binary fission
-plastids have circular chromosomes
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