Evolution Exam 1 NDSU 2018S Questions with correct Answers
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Course
NDSU
Institution
NDSU
Evolution Exam 1 NDSU 2018S Questions with correct Answers
3 aspects of Darwin's theory of Evolution
1. Change over time
2. Descent with modification
3. Evolution by natural selection
What three changes in time have provided evidence of evolution?
1. Marine fossil record showing three c...
Evolution Exam 1 NDSU 2018S
Questions with correct Answers
3 aspects of Darwin's theory of Evolution - answer 1. Change over time
2. Descent with modification
3. Evolution by natural selection
What three changes in time have provided evidence of evolution? - answer 1. Marine
fossil record showing three clear evolutionary faunas over time
2. Body size in woodrats in response to climate change
3. Direct observation of finches and soapberry bugs
Science - answer Use of evidence to construct testable explanations and predictions
of natural phenomena, as well as the knowledge generated during that process
What does descent with modification tell us? - answer 1. Species change though
time
step 1 to failure of AZT to control HIV - answer transcription errors produce
mutations in the reverse transcriptase gene including resistant variants
step 2 to failure of AZT to control HIV - answer Mutant virions pass their reverse
transcriptase genes to their offspring
step 3 to failure of AZT to control HIV - answer In AZT environment, some virions are
better than others at surviving and reproducing
step 4 to failure of AZT to control HIV - answer The persistant ones are the ones with
mutations conferring resistance
Examples of vestigial human traits - answer coccyc, arrector pili (goose bumps) - to
keep warm
Law of succession - answer observing close relationships with fossil and extant
species in same geographical are between fossil forms in adjacent rock strata
Examples of homologous structures - answer Vertebrate forelimbs, same sequence
and arrangement but different functions
Analogies - answer Non-homologous similarities
, Example of analogies - answer shark and orca fins/tails/shapes, embryos in
development
Extraordinary fossils - answer fossils of soft parts
What three insights due extraordinary fossils provide? - answer 1. morphology and
relationships of organisms
2. nature and distribution of soft bodied organisms
3. preserved biomolecules for assessing rates of evolution
Trace fossils - answer Evidence of activity
Pre-Cambian - answer 1. first bacteria
2. first multicellular life
Paleozoic (age of fishes) - answer 1. first land plants
2. first vascular
3. first fishes
4. first tetrapods
5. first insects
Mesozoic (age of dinosaurs) - answer 1. first dinos
2. first birds
3. first flowering plants
4. first mammals
Cenozoid (age of mammals) - answer 1. first horses
2. first whales
3. first apes
4. first daisies
Phylogeny - answer 1. evolutionary history of finite set of organisms
T/F- Branch lengths are proportional to amount of time passing for phylogenies - answer
False
T/F - Branch lengths are not proportional to amount of time passing for phylogenies -
answer true
T/F - Tips of phylogeny cannot be swiveled around nodes - answer false
T/F - order of taxa from top to bottom of phylogenies does not indicate how closely
related they are - answer true
three guidelines for making a phylogeny - answer 1. species on right evolved from
left
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