Chapter 17 Quiz 1

Two species of fireflies come out between the hours of 9-11 pm. Each species has a unique pattern of light flashes to attract their mate. This is an example of

• geographic isolation
• behavioral isolation
• temporal isolation
• reproductive isolation

Figure 17–3 shows smaller and larger beaks in a population of finches. One group of birds has a short, parrot-like beak and another group has a long, narrow beak. What process has probably occurred?

• stabilizing selection
• disruptive selection
• genetic drift
• directional selection

The separation of populations by barriers such as rivers, mountains, or bodies of water is called

• behavioral isolation
• geographic isolation
• temporal isolation
• genetic equilibrium

Species Y and Z have very different genes. Species A and B have only a few different genes. What is most likely true about these species?

• All four of these species are probably equally related to each other.
• Species A and B are more closely related to each other than species Y and Z are to each other.
• Species Y and Z are more closely related to each other than species A and B are to each other.
• Species Y is the ancestor of species A and species Z is the ancestor of species B.

One end of Figure 17–1 shows an increase in average beak size for a population of birds. When individuals at only one end of a bell curve of phenotype frequencies have high fitness, the result is

• directional selection
• genetic drift
• stabilizing selection
• disruptive selection

What situation might develop in a population having some plants whose flowers open at midday and other plants whose flowers open late in the day?

• temporal isolation
• geographic isolation
• behavioral isolation
• genetic drift

The Galápagos finch species are an excellent example of

• genetic equilibrium
• stabilizing selection
• speciation
• selection on single-gene traits

Figure 17–2 shows highest fitness toward the center of the curve. When individuals with an average form of a trait have the highest fitness, the result is

• not predictable
• disruptive selection
• directional selection
• stabilizing selection

If allele frequencies of a population remain constant, the population is experiencing

• evolution
• genetic drift
• genetic equilibrium
• natural selection

The type of genetic drift that follows the colonization of a new habitat by a small group of individuals is called

• the founder effect
• the Hardy-Weinberg principle
• stabilizing selection
• directional selection