Evolution Practice Test For a population in Hardy-Weinberg equilibrium, the frequency of the recessive allele Your friend remarks, "The giraffe increases with each generation stretched its neck while reaching for until it reaches 50% higher leaves; as a result, its offspring decreases with each generation Which statement inherited longer necks” until it reaches 25% is the best response to correct your remains the same in every misconception? friend’s generation Overproduction of offspring decreases due to negative leads to a struggle for survival. selection pressure on Only favorable adaptations have homozygous recessive survival value. individuals Characteristics acquired during increases due to the occurrence an organism's life are generally of new mutations not passed on through genes to its offspring. Disuse of an organ may lead to its eventual disappearance. For a given population that contains genetic variation and is under the Which of the following principles is influence of natural selection, what is the NOT part of of Darwin’s original theory of the following evolution by natural selection? correct sequence events? Evolution is a gradual process 1 Well-adapted that occurs over long periods of individuals leave time. more offspring Variation occurs among 2. A change occurs in individuals in a population. the environment. Mutations are the ultimate source 3. Genetic of genetic variation. frequencies within More individuals are born than the population will survive. change Individuals that possess the most 4. Poorly adapted favorable variations have the best individuals do not chance of reproducing. survive 2 -> 4 -> 1 -> 3 The closely related two different more 2 -> 4 -> 3 -> 1 organisms are, the 4 -> 1 -> 2 -> 3 more similar their habitats are 4 -> 2 -> 3 -> 1 less similar their DNA sequences are more recently they shared a An is common ancestor relative fitness organism’s measured by its less likely they are to have the Mutation rate same genes in common Health and stability in the face of environmental change.
Evolution Practice Test Your friend remarks, "The giraffe stretched its neck while reaching for higher leaves; as a result, its offspring inherited longer necks” Which statement is the best response to correct your friend’s misconception? Overproduction of offspring leads to a struggle for survival. Only favorable adaptations have survival value. Characteristics acquired during an organism's life are generally not passed on through genes to its offspring. Disuse of an organ may lead to its eventual disappearance. Which of the following principles is NOT part of Darwin’s original theory of evolution by natural selection? Evolution is a gradual process that occurs over long periods of time. Variation occurs among individuals in a population. Mutations are the ultimate source of genetic variation. More individuals are born than will survive. Individuals that possess the most favorable variations have the best chance of reproducing. The more closely related two different organisms are, the more similar their habitats are less similar their DNA sequences are more recently they shared a common ancestor less likely they are to have the same genes in common For a population in Hardy-Weinberg equilibrium, the frequency of the recessive allele increases with each generation until it reaches 50% decreases with each generation until it reaches 25% remains the same in every generation decreases due to negative selection pressure on homozygous recessive individuals increases due to the occurrence of new mutations For a given population that contains genetic variation and is under the influence of natural selection, what is the correct sequence of the following events? 1 Well-adapted individuals leave more offspring 2. A change occurs in the environment. 3. Genetic frequencies within the population change 4. Poorly adapted individuals do not survive 2 -> 4 -> 1 -> 3 2 -> 4 -> 3 -> 1 4 -> 1 -> 2 -> 3 4 -> 2 -> 3 -> 1 An organism’s relative fitness is measured by its Mutation rate Health and stability in the face of environmental change.