Which supports the hypothesis that life has changed over time? a. the atmosphere from today and years ago is different. b. the length of a giraffe's neck is longer than those in generations of the past. c. prokaryotic and eukaryotic cells differ in that both do not have a nucleus. d. organisms differ from each other around the world.

Which of the following describes the difference in stimuli required to detect a difference between the stimuli? a. just noticeableb. signal detectionc. subliminald. top down

Describe the change in phase and temperature as water moves from the oceans to the atmosphere and then returns to earth again as rain. a) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature decreases b) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature increases c) evaporation : temperature decreases; condensation : temperature decreases; precipitation (rain) : temperature decreases d) evaporation : temperature increases; condensation : temperature increases; precipitation (rain) : temperature decreases

Which two molecules generated by the krebs cycle pass their high-energy electrons to the electron transport chain? a. nadh b. c6h12o6 c. fadh2 d. nad+