Have an account?
Skip to Content
Build your own quiz
Suggestions for you
10 questions
Show Answers
See Preview
- 1. Multiple Choice
According to the Hardy-Weinburg principle the frequencies of alleles remain constant in a population, but only under certain conditions. Which of these events or conditions is mostly likely to maintain Hardy-Weinburg equilibrium
A. A natural disaster reduces the population to about 20 percent of its previous size.
B. Immigration from a neighboring ecosystem increases the population by 50 percent.
C. The alleles have no effect on which males and females mate and produce offspring.
D. The arrival of a new predator makes one of the alleles more advantageous than the other allele.
- 2. Multiple Choice
A population of a species of butterfly is released on a tropical island. Which condition is necessary for evolution by natural selection to alter the butterfly population over time ?
A. Genetic variation among the members of the population.
B. A lack of competitors for food, water, and other resources.
C. Relatively stable weather on the tropical island.
D. Genetic uniformity among the members of the population.
- 3. Multiple Choice
Bats and Birds are often cited as an example of convergent evolution. Which statement explains this example ?
A. Wings evolved in a common ancestor of bats and birds.
B. Vertebrae evolved in a common ancestor of bats and birds.
C. Flight evolved separately and independently in the ancestors lineages of bats and birds.
D. Bats are classified in a clade with other mammals, while birds are classified in a clade with reptiles.
- 4. Multiple Choice
A scientist proposes that a certain species of bacteria has an unusually high rate of evolutionary change, allowing them to develop new adaptions relatively quickly. Which observation about the species would MOST strongly support the scientist's proposal.
A. The bacteria have a high rate of mutation.
B. The bacteria have a low rate of mutation.
C. The bacteria generally reproduce asexually.
D. The bacteria use circular DNA.
- 5. Multiple Choice
Darwin developed a concept called geographic isolation to explain how species developed. Which observation provided the strongest evidence for this concept.
A. Species that evolved on an island tend to be identical to species on the mainland and on neighboring islands.
B. Species that evolved on an island tend to be different from related species on the mainland and from neighboring islands.
C. Fossil show the ancient species differed in many ways from species today.
D. Some island species arrived naturally, while others were introduced through human activity.
- 6. Multiple Choice
A population of domesticated sheep becomes stranded on a rocky island. Over many years, the physical traits of the sheep population are altered. Their wool became thicker and darker, their hooves became deeper and sturdier, and their ears became smaller and rounder. These changes are an example of which process ?
A. Evolution by artificial selection, because the changes traits are unrelated to fitness.
B. Evolution by artificial selection,because sheep are domesticated animals that were bred by humans.
C. Evolution by natural selection, because the environment selected traits that increased fitness.
D. Changes that do not involve evolution, because the population remained the same species.
- 7. Multiple Choice
Two species of fruit flies whose ranges overlap have different periods of mating activities. Drosophilia persimilis breeds early in the morning, while Drosophilia pseudoobsura breeds in the afternoon. Identify the mechanism of isolation between these two species ?
A. Behavioral isolation: Each species has a courtship pattern that allows males and females to recognize each other.
B. Temporal isolation: The species remain separate because the period of most active mating differs.
C. Geographical isolation: The species remain separate because they have different breeding sites.
D. Reproductive isolation: The sperm of one species cannot fertilize the eggs of the other species.
- 8. Multiple Choice
A team of scientists is studying a population of lizards. The teams that very short lizards tend to be caught and eaten, while very long lizards tend to become weak and listless when they cannot find enough food. Medium-length lizards have neither of these problems, and they tend to love longer and be healthier than the shorter and longer lizards. Which predictions about the lizards population is MOST strongly supported by the scientists' report ? Assume that body length in lizards is inherited as a polygenic trait.
A. The population will experience stabilizing selection, but a variety of lizards will still appear in the population.
B. The population will experience stabilizing selection, and eventually all the lizards will be medium length.
C. The population will experience directional selection, causing medium-length lizards for become more common.
D. The population will experience disruptive selection causing medium-length lizards to become more common.
- 9. Multiple Choice
As Darwin observed, the finch species on the Galapagos Islands differed slightly from one island to the next, and they all differed from mainland species. Which observation provides the STRONGEST support for which conclusion about the evolution of the Galapagos finches.
A. Each island provided reproduction isolation, which allowed new finch species to evolve from a founding population.
B. Each finch species evolved on the mainland, and then migrated to the islands.
C. Each finch species evolved independently on each island and the species are not closely related.
D. All of the islands were once connected, and they began separating after all the finch species had evolved.
- 10. Multiple Choice
A team of scientists in investigating evolution in anoles, which are a type lizard. First, the team obtain a small breeding population of anoles from their natural habitat in a tropical rain forest. Then they release the population onto a tropical island. The team plans to return to the island in 5 years to observe the population and record any changes. Under which condition are the anoles most likely to show new adaptions when the scientists return to the island.
A. The original population on the island has low genetic variation.
B. The original population on the island has high genetic variation.
C. The anoles have low mutation rate.
D. The female anoles lay relatively few eggs.
- Answer choicesTagsAnswer choicesTags