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Example Questions
Example Question #274 : Evolution And Genetics
Which of the following best describes what happens to the frequency of a certain allele in the process of negative selection?
The allele disappears from the gene pool
There is no change in the allele's frequency
It decreases in frequency
It increases in frequency
It decreases in frequency
Negative selection is a type of natural selection in which the frequency of an allele decreases.
Example Question #274 : Evolution And Genetics
Which of the following best represents an example of sexual selection?
Selection for mechanisms that prevent polyspermy
Selection for antibiotic resistance in microorganisms
Selection for brightly colored plumage to attract female birds
Selection for traits that aid in predator avoidance
Selection for brightly colored plumage to attract female birds
Sexual selection is selection for traits that confer greater reproductive success. This includes selection for traits that better attract mates.
Example Question #275 : Evolution And Genetics
Which of the following is not true regarding heterozygote advantage?
Heterozygotes have an advantage in the population
An example in humans is sickle cell anemia
Heterozygosity may confer both advantages and disadvantages
Heterozygosity confers lower fitness
Heterozygosity confers lower fitness
The heterozygote advantage is when a heterozygote phenotype increases fitness, as compared to both homozygote phenotypes. An example of this in human populations is sickle cell anemia—a condition where red blood cells cannot properly transport oxygen. Individuals that are heterozygotes are resistant to malaria. The example of sickle cell anemia demonstrates that heterozygosity may confer advantages and disadvantages, but homozygosity only confers a disadvantage.
Example Question #276 : Evolution And Genetics
Which of the following best defines interference competition?
Direct competition between individuals through aggression
Indirect competition through a limiting resource
Members of the same species compete for the same resources
Indirect competition between two species hunted by the same predator
Direct competition between individuals through aggression
Interference competition is a type of competition that occurs directly between individuals through the use of aggression.
Example Question #277 : Evolution And Genetics
Which of the following best defines apparent competition?
Indirect competition between two species hunted by the same predator
Members of the same species compete for the same resource
Indirect competition through a limiting resource
Direct competition between individuals through aggression
Indirect competition between two species hunted by the same predator
Apparent competition is defined as indirect competition between two species being hunted by the same predator.
Example Question #278 : Evolution And Genetics
Which of the following is not an example of intraspecific competition?
Two male red deer fighting for mates
Two species of grass competing for sunlight
Flamingoes fighting for mates
Organisms of one species of grass competing for sunlight
Two species of grass competing for sunlight
Intraspecific competition is a type of competition that occurs between individuals of the same species. All of the given examples feature intraspecific competition except “two species of grass competing for sunlight,” because it describes competition between two species instead of within the same species.
Example Question #281 : Evolution And Genetics
Which of the following best describes the difference between intraspecific and interspecific competition?
Intraspecific competition is only indirect while interspecific competition cannot be indirect
Interspecific competition is a type of competition within the same species and intraspecific competition is a type of competition between different species
Intraspecific competition encompasses interspecific competition
Interspecific competition is a type of competition between different species and intraspecific competition is a type of competition within the same species
Interspecific competition is a type of competition between different species and intraspecific competition is a type of competition within the same species
Intraspecific competition occurs between members of the same species while interspecific competition occurs between different species.
Example Question #24 : Identify Evolutionary Change Mechanisms
Which of the following is not a mechanism of evolution?
Mutation
Genetic drift
Gene flow
Sexual reproduction
Sexual reproduction
The mechanisms of evolution include gene flow, mutation, genetic drift, and natural selection. All of these mechanisms change allele frequencies in groups of reproducing organisms.
Example Question #282 : Evolution And Genetics
Which of the following is an example of exploitative competition?
Flour beetles eating the eggs of a competitor species of flour beetle
Caterpillars physically intimidating other caterpillars of the same species to guard leaf surface area
Lions chasing hyenas away from their prey
Two species of grass competing for sunlight
Two species of grass competing for sunlight
Exploitative competition is an indirect type of competition through a limiting resource. There was only one scenario in the listed options that illustrated an example of exploitive competition: the indirect competition that takes place in response to a limiting resource as seen in grass species competing for sunlight.
Example Question #283 : Evolution And Genetics
Which of the following statements best describes co-evolution?
Beneficial interactions between species
Interactions between species
Process in which a species diverges into two distinct species
The dying out of a species
Interactions between species
Co-evolution describes interactions among different species. These interactions can be both negative and positive, leading to cooperation or competition. In co-evolution, species develop together.
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