Question: How does natural selection operate? (Select all that apply.)
Answer: -Individuals with adaptations to their environment pass on their genes to more offspring.
-Natural selection acts on genetic variation of organisms in a population.
Question: In what situation might natural selection maintain a recessive allele even if it is harmful?
Answer: Individuals that are heterozygous for a gene have a higher survival and reproductive rate than individuals that are homozygous for the gene.
Question: Genetic drift and migration are mechanisms of evolution but are not mechanisms of natural selection.
Answer: True
Question: Adaptations produce DNA mutations.
Answer: False
Question: The natural selection image in the concept map above indicates that moths with the darkest coloration have the greatest reproductive success when trees in the habitat are dark. What type of natural selection does this image depict?
Answer: Directional selection
Question: An earthquake causes the size of a deer population to drop rapidly over a short period. Allele frequencies shift. What mechanism of evolution does this situation illustrate?
Answer: genetic drift – bottleneck effect
Question:
Answer: The ancestor of these organisms lived on a landmass long ago that included Madagascar, India, and Australia.
Question: What kinds of molecular comparisons are useful for determining species relatedness? (Select all that apply.)
Answer: -Whole-genome comparisons
-Single-gene sequence comparisons
-The protein cytochrome c
-Amino acid sequence of a common protein
Question: What might a scientist do to determine evolutionary relationships among groups of organisms? (Select all that apply.)
Answer: -Compare organisms’ developmental patterns
-Study how organisms are distributed on Earth
-Analyze organisms’ DNA and protein sequences
Question: An alligator and a mouse appear the most similar
Answer: as embryos.