NBB 201 Exam 1 Study Guide Questions
And Actual Answers.
adaptations - Answer traits that help an individual survive and reproduce
conditions for natural selection - Answer variation, differential fitness, heritability
selection - Answer lots of variation, struggle for existence
selection pressures--4 - Answer predators
diseases to parasites
access to food
access to mates
stabilizing selection - Answer observed traits stay steady if existing variants are well adapted
convergent evolution - Answer evidence of natural selection; similar selection pressures
produce similar adaptations in different organisms
genes - Answer genotype
traits - Answer phenotype
genetic variation produced by - Answer random mutation and recombination
evolutionary change - Answer changes in allele frequencies in the gene pool
polygenic inheritance - Answer provides continuous variation- combined action of more than
one gene
--> many traits are polygenic= normal distribution
, mechanisms for microevolution - Answer natural selection
genetic drift
mutation
grouping of distinct species - Answer biological and ecological
biological species concept- - Answer species as interbreeding populations reproductively
isolated from others
-reproductive isolation
ecological species concept - Answer defines a species based on the uniqueness of its
ecological niche
-selection
modes of speciation - Answer allopatric, parapatric, sympatric
allopatric speciation - Answer reproductive isolation because of geographic barrier
parapatric speciation - Answer selection for different tratis
character displacement - Answer in allopatric speciation; competition increases morphological
differences that in turn produces species to diverge to favored environment
reinforcement - Answer in allopatric speciation; may act to reduce extent of gene flow by
favoring traits/adaptations that prevent mating between 2 species
hybrid zone - Answer zone where animals come from different habitats and with different
characteristics to mate
niche - Answer particular way of making a living
-rates of speciation depend on number of available ecological niches
And Actual Answers.
adaptations - Answer traits that help an individual survive and reproduce
conditions for natural selection - Answer variation, differential fitness, heritability
selection - Answer lots of variation, struggle for existence
selection pressures--4 - Answer predators
diseases to parasites
access to food
access to mates
stabilizing selection - Answer observed traits stay steady if existing variants are well adapted
convergent evolution - Answer evidence of natural selection; similar selection pressures
produce similar adaptations in different organisms
genes - Answer genotype
traits - Answer phenotype
genetic variation produced by - Answer random mutation and recombination
evolutionary change - Answer changes in allele frequencies in the gene pool
polygenic inheritance - Answer provides continuous variation- combined action of more than
one gene
--> many traits are polygenic= normal distribution
, mechanisms for microevolution - Answer natural selection
genetic drift
mutation
grouping of distinct species - Answer biological and ecological
biological species concept- - Answer species as interbreeding populations reproductively
isolated from others
-reproductive isolation
ecological species concept - Answer defines a species based on the uniqueness of its
ecological niche
-selection
modes of speciation - Answer allopatric, parapatric, sympatric
allopatric speciation - Answer reproductive isolation because of geographic barrier
parapatric speciation - Answer selection for different tratis
character displacement - Answer in allopatric speciation; competition increases morphological
differences that in turn produces species to diverge to favored environment
reinforcement - Answer in allopatric speciation; may act to reduce extent of gene flow by
favoring traits/adaptations that prevent mating between 2 species
hybrid zone - Answer zone where animals come from different habitats and with different
characteristics to mate
niche - Answer particular way of making a living
-rates of speciation depend on number of available ecological niches
