UNIT TEST

A farmer is trying to determine the maximum number of cattle his pasture can sustain without degrading the land. This concept is known as what?

• Natural selection

• Carrying capacity

• Antibiotic resistance

• Evolution

The number of people per square mile in New York City would be an example of what kind of density?

• Species density

• Population density

• Clumped dispersion

• Random dispersion

The number of deer, rabbit, squirrel per square mile would be an example of which type of density?

• Population density
• Uniform dispersion
• Species density
• Random dispersion

For rabbits to repopulate many factors come into play. For example, space, food, and shelter. The availability of these resources can cause population increase or decrease depending on their availability. What type of factor are these resources?

• Abiotic factors
• Biotic factors
• Limiting factor
• Density independent factors

True or False: In a forest ecosystem, density dependent factors such as availability of food, predation, and disease affect population growth as the population density increases.

• True

• False

A volcanic eruption devastates an island, affecting the local wildlife populations. This event is an example of what type of factor?

• Density dependent factor

• Limiting factor

• Abiotic factor

• Density independent factor

True or False: Charles Darwin was a british naturalist who proposed the theory of biological evolution by natural selection

• True
• False

Darwin's theory of evolution included three main points one of which aligned with his observations of the finches in the galapagos islands. In his observations he noticed that the birds on the island looked similar to the ones on the mainland in south america. He concluded that the birds must have flown over millions of years ago and evolved, creating new species. Which point of Darwin's theory of evolution does this situation mainly fall under.

• Species can change over time
• New species come from pre-existing species
• All species share a common ancestor

What is evolution?

• A change in appearance over time
• A change in general
• A change in genetic makeup over generations
• Change in a ecosystem over generations

Birds migrating south for the winter is an example of which mechanism of evolution?

• Mutation

• Non-random mating

• Gene flow

• Genetic drift

• Natural selection