UW Bio 180 - Exam 3 Questions With
100% Verified Answers
species -
correct answer ✅evolutionarily independent population or group
of populations
synapomorphy -
correct answer ✅a trait that is found in certain groups of
organisms and their common ancestor, but is missing in more
distant ancestors; identifies monophyletic groups; homologous
traits that can be identified at the genetic, developmental, or
structural level
biological species concept -
correct answer ✅reproductive isolation between populations
(they don't breed and don't produce viable, fertile offspring)
- reproductive isolation = evolutionary independence
- not applicable to asexual or fossil species; difficult to assess if
populations don't overlap geographically
reproductive isolation: prezygotic ("before-zygote") -
correct answer ✅prevents individuals of different species from
mating
temporal: populations are isolated because they breed at different
times
, UW Bio 180 - Exam 3 Questions With
100% Verified Answers
- habitat: populations are isolated because they breed in different
habitats
- behavioral: populations don't interbreed because their courtship
displays differ
- gametic barrier: matings fail because eggs and sperm are
incompatible
- mechanical: matings fail because male and female reproductive
structures are incompatible
reproductive isolation: postzygotic ("after-zygote") -
correct answer ✅offspring of matings between members of
different species do not survive or reproduce
- hybrid viability: hybrid offspring don't develop normally and die as
embryos
- hybrid sterility: hybrid offspring mature but are sterile as adults
morphospecies concept -
correct answer ✅morphologically distinct populations;
distinguishing features are most likely to arise if populations are
independent and isolated from gene flow
- widely applicable
100% Verified Answers
species -
correct answer ✅evolutionarily independent population or group
of populations
synapomorphy -
correct answer ✅a trait that is found in certain groups of
organisms and their common ancestor, but is missing in more
distant ancestors; identifies monophyletic groups; homologous
traits that can be identified at the genetic, developmental, or
structural level
biological species concept -
correct answer ✅reproductive isolation between populations
(they don't breed and don't produce viable, fertile offspring)
- reproductive isolation = evolutionary independence
- not applicable to asexual or fossil species; difficult to assess if
populations don't overlap geographically
reproductive isolation: prezygotic ("before-zygote") -
correct answer ✅prevents individuals of different species from
mating
temporal: populations are isolated because they breed at different
times
, UW Bio 180 - Exam 3 Questions With
100% Verified Answers
- habitat: populations are isolated because they breed in different
habitats
- behavioral: populations don't interbreed because their courtship
displays differ
- gametic barrier: matings fail because eggs and sperm are
incompatible
- mechanical: matings fail because male and female reproductive
structures are incompatible
reproductive isolation: postzygotic ("after-zygote") -
correct answer ✅offspring of matings between members of
different species do not survive or reproduce
- hybrid viability: hybrid offspring don't develop normally and die as
embryos
- hybrid sterility: hybrid offspring mature but are sterile as adults
morphospecies concept -
correct answer ✅morphologically distinct populations;
distinguishing features are most likely to arise if populations are
independent and isolated from gene flow
- widely applicable
