Which two eras ended with mass extinctions?

its Paleozoic and mesozoic right?

How do bicameral and unicameral legislatures differ?

How did World War I impact African Americans?

What was the affects of colonists interacting with native americans

Which of the following best states an argument of French philosopher Jean-Jacques Rousseau? In order for a government's laws to be valid, citizens have to agree with those laws.

How worried was Cortes about his actual authority to act in Mexico. (He was worried).

What were major reasons for Europe to colonize the American continent

Is there check and balances in federalism?

Mesopotamian civilizations were organized into city-states. All of the following are true about these city-states except: a.

Identify and explain TWO similarities between the status of women under Islam during the seventh and eighth centuries C. E. And the status of women in a Greek city-state and/or the Achaemenid (Persian) Empire during the fifth an fourth centuries B.

When spain controlled texas, friars raised cattle for food. (true/false)