Why is respiration an exothermic reaction?
a. a large amount of energy is released into its surroundings
b. the heat content, q, of the reaction is positive
c. a large amount of energy is required to activate the reaction
d. there is no exchange of energy between the system and the surrounding

Which property of fossils allow scientists to determine the relative rock ages..

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

Blood pressure the total amount of blood the heart pumps in one minute 2. cardiac output the number of times your heart beats in a minute 3. dilate the amount of blood that the heart can pump in a single beat 4. heart rate the force exerted on the walls of the blood vessels by the blood that moves through them 5. stroke volume to widen or get larger in size