To maintain order within their cells and organs, all living things must
a. constantly change.
b. be able to move.
c. reproduce.
d. carry on metabolism.
e. extract energy from sunlight

The energy needs of a human population are not affected by

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

Acar company is testing seatbelts using crash test dummies. the company finds that when cars come to a sudden stop, the crash test dummies' bodies continue to move forward. the seat belt keeps the crash test dummies from hitting the back of the seat in front of them. why do the crash test dummies' bodies continue to move forward even though the car stopped? a. the friction opposing their bodies' movement keeps them in motion. b. the inertia of their bodies keeps them in motion. c. the forward acceleration of the car keeps them in motion. d. the gravity pulling on the car keeps them in motion.