Most organisms carry out cellular respiration. Which of the following best describes cellular respiration? A. a process in which organisms release oxygen to the air
B. a chemical process in which cells use light energy to make food
C. a mechanical process in which humans take in oxygen from the air
D. a chemical process in which cells use oxygen to release energy from food

After getting the slide and microscope ready, stella is eager to see the microscopic pond water specimen! she crouches around her microscope and aligns her eye with the microscope’s eyepiece. but she's only able to see a bright white light. at this point, no specimens or cells are visible on stella's pond water slide. after taking a moment to collect her thoughts, stella realizes she can't see any lifeforms because .

Modern whales developed their traits through natural selection what occurs during the process of natural selection

Asolution of an enzyme and a substrate was placed in a water bath and the temperature of the reaction was raised gradually. the graph shown was plotted at the end of the experiment. what can be concluded from the graph? a) temperature has no effect on the activity of the enzyme. b) the effect of temperature on the enzyme is unpredictable. c) the enzyme shows increased activity up to a certain temperature. d) the activity of the enzyme is inversely proportional to the temperature.