Domain 5 Pre-Review Practice

What does the endosymbiotic theory propose that mitochondria in eukaryotic cells arose from? (SB6a)

• endosymbiotic eukaryotes that metabolized oxygen

• endosymbiotic eukaryotes that were photosynthetic

• endosymbiotic prokaryotes that metabolized oxygen

• endosymbiotic prokaryotes that were photosynthetic

The diagram shows two populations of toads. Population B formed after a few toads from population A were carried into a new environment. Based on the diagram, how might the toads in population B differ from the toads in population A after several generations? (SB6b)

• The toads in population B might have smaller eyes in order to see in the dark.

• The toads in population B might have a longer tongue in order to catch distant prey.

• The toads in population B might have darker skin in order to blend into their environment.

• The toads in population B might have brighter skin in order to attract prey.

An archaeologist uncovers some bones that he suspects belonged to a relative of today's modern horse. What is the BEST method of testing this belief? (SB6c)

• perform a DNA comparison of the two subjects

• create a model of bones from similar burial sites

• perform a cytochrome c comparison of the two subjects

• create a model showing the two organisms side by side

Answer explanation

Performing a DNA comparison of the two subjects would definitively prove if the organisms were related.

Which statement best describes the scientific community's current understanding of natural selection? (SB6d)

• Natural selection influences the frequency of an adaptation in a population.

• Natural selection determines all the genetic traits of an organism.

• Natural selection has little effect on the survival of a species.

• Natural selection causes mutations in genetic material.

The diagram shows colonies of different species of bacteria in a growth medium before antibiotic treatment, during treatment, and after treatment. Which statement describes three ways the antibiotic-resistant bacteria are able to survive? (SB6e)

• They survive through the processes of adaptation, learned resistance, and gradual reproduction.

• They survive through the processes of mutation, natural resistance, and rapid reproduction.

• They survive through the processes of viral infection, mutation, and gradual reproduction.

• They survive through the processes of evolution, meiosis, and rapid reproduction.