A population of salamanders migrates from a sand beach to a pebble beach and evolves over many generations from a solid color to a speckled color. This process is called evolution.

Which of the following could be defined as the “job description” of a species that defines its role in the area in which it lives?

Normally, veins close to the heart are pulsatile

———— are the primary route of blood return

Which of the following best explains why Americans are divided in their views on immigration?

Which best describes how Democratic and Republican presidents have approached the Environmental Protection Agency? 

Which is NOT a major federal law that addresses environmental concerns?

Match the health care program or law with its description.

What changes were made to “welfare” in the 1990s, when the TANF program replaced the AFDC?

What do a majority of Americans say about government spending and programs?