2. Calculate the kinetic energy of a dodgeball that has a mass of 2 kg and velocity of 4 m/s after being thrown. a. 32J
b. 64 J
c. 16 J
d. 8J

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -

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

Match each symbol with its description.