What contribution did Jonas Salk make to science in the 1950s?

A.

He invented DDT, the "miracle" pesticide.

B.

He designed the first US satellite.

C.

He developed smaller computers.

D.

He created a vaccine against polio.

1) Where were the Native American tribes forced to march during the Trail of Tears? California Arizona Colorado Oklahoma Texas

How did the arms race affect Cold War tensions between the United States and the Soviet Union?

Which principle shows a key difference between government in the united states and government in other democratic countries?

What is the most holy book of Judaism

How did the Terror end and who took power as a result of the end of the violence?

1. In what ways have the treaties been of lasting significance to all Canadians? 2. In what ways do you think the pass system affected the lives of First Nations people? What long-term consequences might the pass system have had?

Ideas found in the Declaration of Independence were influenced by the

Some historians call the Soviet-Afghan war the Soviet Union's "Vietnam." What do they mean by this reference

What entrepreneurial abilities did the strauss brothers have?

Why did the states of prussia lead german unification?.