Photosynthesis uses CO 2and cellular respiration produces CO 2 . We call the point when the two processes are in balance — when there is no net production of CO 2— the compensation point. How might you limit one of the processes in order to achieve a compensation point?

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.