What causes the piston to move in this engine? the crank the fuel in the tank
heated gases in the chamber
all of the above

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm

Abeaker of water was heated and then placed on a bench in the laboratory. the water cooled until it was the same temperature as the air in the laboratory. which of these explains the mechanism by which the water cooled? a. heat energy was transferred from the water to the air. b. water molecules from the water formed warm water currents. c. the water molecules absorbed energy from the molecules in the air. d. the water released radiation until it contained no heat energy.

What is the importance of dna replication to all living organisms?