A fruit fly is classified as a consumer rather than as a producer because it is unable to*

Which change is an example of maintaining dynamic equilibrium?*

Organisms contain compounds such as proteins, starches, and fats. The chemical bonds in these compounds can be a source of*

Phosphorus is necessary for the growth of healthy plants. Scientists are developing plants that can grow in phosphorus-poor soil. Some of these new varieties, produced in a lab, make extra copies of a protein that helps them obtain more phosphorus from the soil. The process being used to develop these new varieties is most likely*

Which life function is not necessary for an individual organism to stay alive?*

Lobsters prey on sea hares, which are marine animals. The lobsters find their prey through a sense of smell. The sea hares defend themselves by squirting ink at the lobster, as shown in the photo below. The ink sticks to the lobster, interfering with its sense of smell.

The most likely reason the sea hare can escape is because the sea hare ink*

Which statement is an accurate description of genes?*

The bobolink is a small blackbird that nests in fields of tall grass. It breeds in the summer across much of southern Canada and the northern United States. It migrates long distances, wintering in southern South America. The numbers of these birds are declining due to disruption of the areas where they live.

In order to save these birds from extinction, the best course of action would be to*

A child with cystic fibrosis has an altered protein in his cells that stops chloride ions from leaving the cells. This protein most likely affects the functioning of*

Which row in the chart below shows a direct relationship that can exist between two living organisms?

*

Scientists have studied the return of plant life on Mount St. Helens ever since the volcano erupted in 1980. Wildflowers began colonizing the area, followed by shrubs and small trees. Scientists predict that it will likely take hundreds of years before the area returns to a forest dominated by fir and hemlock trees. These changes are an example of*

The most likely result of completely removing carbon dioxide from the environment of a plant is that sugar production will*

Before a new shopping center can be built on previously undeveloped land, the builders must submit a proposal to the local government for approval. Which statement identifies an environmental concern associated with the development of the shopping center?*

Homeowners have been encouraged to learn how to identify invasive plants and to remove them if they find them. The most likely reason for removing invasive plants is to*

Which row in the chart below correctly pairs a human activity with its impact on the environment?

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