Biogeographic Isolation Answers

Which is the best definition of directional selection?

Which type of selection occurs when a population experiences a shift in diversity toward the larger organisms?

Which organisms are most likely to survive in a population in which disruptive selection is occurring?

Your teacher describes a population of fish that live in a coral reef. Some fish are dark orange (the same color as the coral). Some fish are nearly white. Most of the fish exhibit a color between dark orange and nearly white. Human activity has led to the bleaching of the coral reefs, making them very pale in color. Over time, the population of fish will be affected. Which graph represents the type of selection that you expect to occur?

Which of the following can result in a population looking more similar over time and can be described as selection against both extremes of a trait?

Which graph represents selection that may lead to reduced variation in a population?

A population of chimpanzees was separated when the forest that they lived in had a section cut down and a town was built. After a long period of time, the chimpanzees came back into contact but were incapable of breeding. Which of the following best describes the process that occurred?

Imagine a population of rabbits with fur color that ranges from black to white. If this population were put in an area that has dark rocks that camouflage the black rabbits, as well as light stones that hide the white rabbits, what would most likely happen to the gray rabbits?

Which process drives Darwin’s theory of evolution?

A population of pigs lives on an island together with burrowing termites. Pigs that have the longest snouts tend to survive more frequently than those with shorter snouts. Over time, most of the pig population is made up of individuals that have very long snouts. This is an example of which type of selection?