One difference between plant and animal cells is that (1) plant cells have cell walls; animal cells don't (2) plant cells can't move; animal cells can (3) plant cells live in water; animal cells don't ( 4) plant cells have a nucleus; animal cells don't (5) plant cells have vacuoles; animal cells don't

An easy way to calculate the amount of energy available at each level is to what?

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.

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.