BIO 182 EXAM 1| WITH ACTUAL
COMPLETE QUESTIONS AND 100%
CORRECT ANSWERS| VERIFIED BY
EXPERT| NEWLY UPDATE 2025.
Evolution - answer ✔✔ descent with modification
Natural selection - answer ✔✔ mechanism for change
Genetic drift - answer ✔✔ random change in alleles
Anatomical homologies - answer ✔✔ variations on a structural theme that was present in a
common ancestor
Speciation - answer ✔✔ the process by which one species splits into two or more species
Microevolution - answer ✔✔ changes in allele frequencies within a population
Macroevolution - answer ✔✔ the broad pattern of evolution over time
Species - answer ✔✔ taxonomic group whose members can interbreed
Reproductive isolation - answer ✔✔ the existence of biological barriers that prevent members of
two species from producing viable, fertile hybrids
Hybrid - answer ✔✔ an organism that is the offspring of genetically dissimilar parents or stock
Prezygotic barriers - answer ✔✔ prevents fertilization between species
Habitat isolation - answer ✔✔ organisms that use different habitats are unlikely to encounter
each other and mate
Behavioral isolation - answer ✔✔ species use unique and elaborate behaviors to attract mates
thus isolating other species
Temporal isolation - answer ✔✔ two species that breed at different times of day, season, or year
are unlikely to encounter each other and mate
Mechanical isolation - answer ✔✔ closely related species cannot mate because of incompatible
bodies
, Gametic isolation - answer ✔✔ gametes of two species do not form a zygote because of
incompatibilities preventing fertilization
Postzygotic barriers - answer ✔✔ prevents hybrid zygotes from developing into viable, fertile
adults
Reduced hybrid viability - answer ✔✔ genetic incompatibility between two species may abort
the hybrid embryo
Reduced hybrid fertility - answer ✔✔ even if a hybrid develops into a healthy, strong adult, it
may be infertile
Hybrid breakdown - answer ✔✔ first-generation hybrids are viable and fertile but when they
mate with either parent species, the next generation is feeble or sterile
Morphological species concept - answer ✔✔ defines a species by body shape and other structural
features
Ecological species concept - answer ✔✔ defines species in terms of its ecological niche
Phylogenetic species concept - answer ✔✔ defines a species as the smallest group of individuals
that shares a common ancestor and forms on branch on the tree of life
Allopatric speciation - answer ✔✔ geographic separation of populations restricts gene flow
Sympatric speciation - answer ✔✔ speciation occuring in populations that live in the same
geographic area
Polyploid - answer ✔✔ organism having more than twice the haploid number of chromosomes
Autopolyploid - answer ✔✔ having two or more complete sets of chromosomes derived from the
same species
Allopolyploid - answer ✔✔ having two or more complete sets of chromosomes derived from
different species
Habitat differentiation - answer ✔✔ when subpopulations become dependent on different
resources than the parent population
Sexual selection - answer ✔✔ a mode of natural selection in which some individuals
outreproduce others of a population because they are better at securing mates
Hybrid zone - answer ✔✔ region in which members of different species meet and mate,
producing hybrids
COMPLETE QUESTIONS AND 100%
CORRECT ANSWERS| VERIFIED BY
EXPERT| NEWLY UPDATE 2025.
Evolution - answer ✔✔ descent with modification
Natural selection - answer ✔✔ mechanism for change
Genetic drift - answer ✔✔ random change in alleles
Anatomical homologies - answer ✔✔ variations on a structural theme that was present in a
common ancestor
Speciation - answer ✔✔ the process by which one species splits into two or more species
Microevolution - answer ✔✔ changes in allele frequencies within a population
Macroevolution - answer ✔✔ the broad pattern of evolution over time
Species - answer ✔✔ taxonomic group whose members can interbreed
Reproductive isolation - answer ✔✔ the existence of biological barriers that prevent members of
two species from producing viable, fertile hybrids
Hybrid - answer ✔✔ an organism that is the offspring of genetically dissimilar parents or stock
Prezygotic barriers - answer ✔✔ prevents fertilization between species
Habitat isolation - answer ✔✔ organisms that use different habitats are unlikely to encounter
each other and mate
Behavioral isolation - answer ✔✔ species use unique and elaborate behaviors to attract mates
thus isolating other species
Temporal isolation - answer ✔✔ two species that breed at different times of day, season, or year
are unlikely to encounter each other and mate
Mechanical isolation - answer ✔✔ closely related species cannot mate because of incompatible
bodies
, Gametic isolation - answer ✔✔ gametes of two species do not form a zygote because of
incompatibilities preventing fertilization
Postzygotic barriers - answer ✔✔ prevents hybrid zygotes from developing into viable, fertile
adults
Reduced hybrid viability - answer ✔✔ genetic incompatibility between two species may abort
the hybrid embryo
Reduced hybrid fertility - answer ✔✔ even if a hybrid develops into a healthy, strong adult, it
may be infertile
Hybrid breakdown - answer ✔✔ first-generation hybrids are viable and fertile but when they
mate with either parent species, the next generation is feeble or sterile
Morphological species concept - answer ✔✔ defines a species by body shape and other structural
features
Ecological species concept - answer ✔✔ defines species in terms of its ecological niche
Phylogenetic species concept - answer ✔✔ defines a species as the smallest group of individuals
that shares a common ancestor and forms on branch on the tree of life
Allopatric speciation - answer ✔✔ geographic separation of populations restricts gene flow
Sympatric speciation - answer ✔✔ speciation occuring in populations that live in the same
geographic area
Polyploid - answer ✔✔ organism having more than twice the haploid number of chromosomes
Autopolyploid - answer ✔✔ having two or more complete sets of chromosomes derived from the
same species
Allopolyploid - answer ✔✔ having two or more complete sets of chromosomes derived from
different species
Habitat differentiation - answer ✔✔ when subpopulations become dependent on different
resources than the parent population
Sexual selection - answer ✔✔ a mode of natural selection in which some individuals
outreproduce others of a population because they are better at securing mates
Hybrid zone - answer ✔✔ region in which members of different species meet and mate,
producing hybrids
