Which plate forms a boundary with the African Plate? A. Pacific

B. South American

C. Nazca

D. Philippine

Which term refers to the total dollar value of the goods and services produced in a country in a year?

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?