Unit Test — Unit test Answers

A mountain lion population recently experienced a drop in population size. Which of the following would best describe the limiting factor that is involved?

Which describes a way in which phosphorus may enter into the phosphorus cycle?

The Serengeti plains are part of the African savanna ecosystem and are home to a variety of different species of plants and animals. The Serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. Which type of limiting factors does the seasonal drought in the Serengeti plains affect?

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Review the picture below.Which would be the most accurate title for this picture?

A hunter illegally kills a wolf in Yellowstone National Park and attempts to bring the wolf's skull back to Florida. Which law is the hunter violating?

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Ash trees are being removed when they show signs of the ash borer, a parasite that affects only ash trees and kills them off. What best explains why the ash trees are being cut down?

Ground squirrels are found in many areas of the United States. They live in underground burrows and are often attacked by birds of prey, coyotes, and bobcats. Which of the following is a limiting factor for a ground squirrel population?

An ecosystem has experienced a flood. Which type of plants would you expect to see growing first after the flood?

What kind of display would be the best way to represent the data below?Type of speciesCritically endangered (%)Endangered or vulnerable (%)Plants1370Invertebrates035Freshwater fish937Amphibians730Reptiles528Birds012Mammals221

On May 18, 1980, Mount St. Helens in Washington State experienced a huge volcanic eruption after a magnitude 5.1 earthquake. During the eruption, hot ash and pumice poured down the west, south, and east sides of the mountain, melting the snow and ice at the top of the volcano and producing volcanic mudflows. Which type of process first occurred in the ecosystem around Mount St. Helens after it erupted?

What process adds carbon dioxide to the air?

What is the effect of the biogeochemical cycles?

What is most likely to result immediately after a rainforest in Brazil is clear-cut?

Why are bacteria a necessary part of the nitrogen cycle?

What will most likely increase if there is a high death rate?

Actinobacteria sp. are fermenting organisms, which do not require oxygen to survive. These organisms break down organic material and convert it to inorganic material. Which part of the carbon cycle does this describe?

Which type of limiting factor affects a large population more than it affects a small population?