Cumulative Exam Answers

Review the chart, which shows the population sizes of three African animals in 1990 and in 2000. Population Estimates of Animals in Africa in 1990 and in 2000 19902000Lions100,00047,000Cheetahs25,0007,500Zebras750,000450,000Which explanation is best supported by the numbers in the chart?

Earth scientists have concluded that the methods of harnessing energy that have been used over the past two centuries, such as the burning of fossil fuels, are causing climates around the world to change more quickly and suddenly than ever before in human history. Evidence includes increased air temperatures, rising sea levels, and the shrinking of glaciers in Greenland, Alaska, and other regions of Earth. The most complex level of organizational hierarchy that climate change could potentially affect is Earth’s

White perch is a fish that is native to Atlantic coastal regions and is invasive to the Great Lakes. It feeds on native species and is thought to be the cause of the decline of the Great Lakes walleye fish populations. What was most likely its mode of introduction?

Scientists use specific levels of organization to analyze the biosphere. The Everglades consist of a large area of subtropical wetlands in Florida. Various species of plants and animals can be found in the Everglades, including panthers, cypress trees, herons, and alligators.The group of ecosystems on Earth that feature climate, vegetation, and wildlife similar to the Everglades is

Which environmental policy must consider the expensive startup costs associated with building machines that harvest energy from clean sources?

Which human-induced change results in increased competition caused by an initial increase in the number of organisms in a habitat?

Which statement explains how smog forms?

The image illustrates a human-induced environmental change.

Why is urbanization contributing to pollution?

Wolves are predators of deer. What is most likely to happen to the deer population if the wolf population increased?

The map shows the distribution of wild boars in the United States (shaded area). Which of these facts about wild boars is best supported by the evidence provided?

Which best matches objects that a scientist would include on a list describing a forest ecosystem?

How does the construction of dams positively affect natural resources?

Which statement describes the current theory about the relationship between the human population and mass extinction?

What is the difference between a community and a population?

Which best explains the effect of reforestation on land?

In the 1980s laws were passed to reduce the amount of certain chemicals used by companies and individuals. According to these laws, the use of chlorofluorocarbons, or CFCs, should be reduced and eventually eliminated. These compounds contain chlorine and cause problems when released into the Earth’s atmosphere.

A scientist is conducting research about all the plants and wildlife in the Mojave Desert as well as the desert’s resources, such as water and soil. The scientist is studying

Which type of symbiotic relationship is described in the following scenario?Termites are unable to digest some plant materials (fiber). Termite stomachs contain bacteria that digest the fiber in wood for the termites. In turn, the bacteria are provided with a hospitable environment to carry out their life processes.

What is one way people positively affect water resources?

What process leads to deforestation and increased erosion?

A coral reef, shown below, is an underwater structure that is home to many sea animals that use the water as a resource. Some animals are called stony corals because they have hard bodies that resemble rocks. Stony corals provide protection to other animals that live on the reef.Which is the largest organizational level found in one coral reef?

Which chemicals are major contributors to ozone layer destruction? Select two answer choices.phosphorusnitrogenbrominechlorinecarbon dioxidemethane

Which of the following are examples of short-term, human-induced environmental changes? Select three answer choices. mass extinctionglobal warmingdeforestationozone layer destructionpollution

Which is a negative effect of deforestation on the environment?

Legumes, a type of plant, require Rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen. Rhizobia use the legumes for food. What would most likely happen to the legume population if Rhizobia suddenly became extinct?

Which statement provides the best argument against making major changes to the atmosphere to help protect Earth’s resources?

How has the EPA improved air quality over the last 30 years?

These penguins are all members of the species Aptenodytes patagonicus.What is the difference between a species and a population?

eutrophicationhabitat destructionnonnative species introductiondeforestation

As human travel increases, the number of introduced species likely

When an insect touches the bristles on the lobes of a Venus flytrap, the lobes close quickly, engulfing the insect. The movement of the insect inside the lobes causes the flytrap to secrete digestive enzymes that kill the insect. Which type of relationship does this describe?