What must be present before natural selection can act upon a population? - correct answer Genetic variation
Most Swiss Starlings produce four to five
... [Show More] eggs in each clutch. Starlings producing fewer or more than this have reduced fitness. This situation can be described by what? - correct answer Stabilizing selection
Genetic drift, gene flow, mutation, natural selection and non random mating have a better chance of influencing gene frequencies in a small population. But which one has the most consistency with needing a small population? - correct answer Genetic drift
p+q= - correct answer 1
p²+2pq+q²= - correct answer 1
p= - correct answer frequency of "A" alleles
q= - correct answer frequency of "a" alleles
p²= - correct answer frequency of AA genotype
2pq= - correct answer frequency of Aa genotype
q²= - correct answer frequency of aa genotype
What happens when one of the conditions of Hardy Weinberg are not met? - correct answer evolution
In seed cracker finches from cameroon, small billed and large billed birds specialize in cracking soft and hard seeds respectively. If long term climactic change resulted in all seeds becoming hard, what type of selection would then operate in the finch population? - correct answer Directional selection; when conditions favor individuals with one extreme of a phenotype (common with environment changes and migration)
Disruptive selection - correct answer when conditions favor an individual with both extremes of a phenotype over individuals with intermediate phenotypes
Stabilizing selection - correct answer when conditions favor intermediate phenotypes rather than extremes
Most consistent at causing populations to become better suited to their environment over the course of generations. - correct answer Natural selection
Diversity is understood to be a result of genetic variation. What is a recognized source for evolution? - correct answer Recombination by crossing over in mitosis
Biological species concept - correct answer defines a species as a group of populations that have the ability to interbreed and produce viable offspring
Morphological species concept - correct answer defines a species based on body shape and structural features
Phylogenetic species concept - correct answer defines a species by the smallest group of individuals that share a common ancestor [Show Less]