Factors Affecting Biological Diversity Answers

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?

Two insect groups vary genetically by two genes. When put together, they were able to reproduce and produce offspring that could also breed. Which best describes this insect population?

A scientist wrote a paper titled “Directional Selection in Action” after observing a population of mice for 15 years. The mice typically preferred to eat berries, although a few would also eat insects. After a drought in year 3, the scientist observed that more mice were eating insects. By year 10, most of the mice in the population ate insects in addition to berries. Which best describes her article?

Which is the best definition of directional selection?

Which process drives Darwin’s theory of evolution?

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?

Stick insects, also called walking sticks, are typically found in tropical and subtropical forests and grasslands. The insects are able to camouflage themselves by living among twigs in their environment.What is this an example of?

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?

In a bird population, 50 % of the individuals had white feathers, and 50% had colored feathers. Over time, it was observed that 98% of the population had colorful feathers. The rest had white feathers. How did the type of selection in this example affect the population’s biodiversity?