BIOL 171 Final Exam Questions and Answers 2024
Evolution is a theory that can be applied to different species, but cannot be directly tested
False
Several scientific studies have reported results that reject the process of evolution
False
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Evolution is a theory that can be applied to different species, but cannot be directly
tested - answer False
Several scientific studies have reported results that reject the process of evolution -
answer False
Two species of birds that are closely related have evolved from an extinct common
ancestor - answer True
Crab and human share common ancestor - answer True
Evolution often produces species that appear to have imperfect characteristics - answer
false
Evolution - answera mechanism that explains how species change over time
closest living ancestors to humans - answer chimpanzees and bonobos
Adaptive organisms - answerorganisms are adopted to environment in which they live
adaptation - answera heritable trait or behavior that aids the survival and reproduction of
an organism in its present environment
species - answera group of individuals organisms that interbreed and produce fertile,
viable offspring
population - answera group of individual that share a gene pool and includes individuals
natural selection - answerindividuals that have certain inherited traits tend to survive
and reproduce at higher rates than individual that don't
How thought of Natural Selection? - answerDarwin and his finches
The Biological Species Concept - answerDeveloped by Enerst Mayr
a species is a group of organisms that can interbreed into nature and produce viable
fertile off spring
morphlogical species concept - answerfossil species identification
, phylogenetic species concept - answerasexual species identification relies on genetics
different and morphology
How do species form? - answerthrough speciation
Speciation - answerthe formation of species from one original species
Speciation requirements - answerbarrire to gene flow
Evolution (via natural selection) that leads to reproductive isolation
Natural Selection Observation 1 - answerMembers of a population vary in their inherited
traits
Natural Selection Observation 2 - answerAll species can produce more offspring than
their environment can support and many of these offspring fail to survive and reproduce
After speciation occurs, what do we call the original species? - answerAncestor species
Barriers that can lead to speciation - answerAllopatric and sympatric
Allopatric Speciation - answergeographic barrier that reduces gene flow
Sympatric Speciation - answersubset of population acquires differences
What does speciation happen through? - answerit happens through polyploidy
Polyploidy - answercondition where organism have more than two paired sets of
chromosomes
Autopolyploidy - answerone species involved in generating a polyploid
Allopolyploidy - answertwo species involved in generating polyploid
Type of Reproductive Isolation - answerPre-zygotic and post-zygotic isolation
pre-zygotic isolation - answermechanisms that prevent mating or hinger fertilization
before mating occurs
post-zygotic isolation - answermechanisms that prevent a hybrid zygote from
developing into a viable, fertile adult (acting after mating occurs)
Type of Pre-Zygotic isolation - answerhabitat, temporal, behavioral, mechanical,
habitat isolation - answerspecies occupy different habitats, never come into contact
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