Which substances are the main raw materials of photosynthesis?

A plant is kept in darkness for several hours. Which statement is most accurate?

Which statement best describes the relationship between photosynthesis and cellular respiration?

Which substances are used as reactants in aerobic cellular respiration?

In a sealed container with a plant and a small animal, the plant receives enough light. Which exchange can help both organisms survive for a time?

A healthy green plant is placed in bright light with enough water but no available carbon dioxide. Which process is most directly limited?

Which pair is produced during photosynthesis?

Which summary would best complete a chart showing matter cycling between photosynthesis and respiration?

A learner says, “Plants photosynthesize during the day and respire only at night.” Which evaluation is best?

During vigorous exercise, muscle cells need more usable energy. Which process supplies this energy by breaking down glucose?

A diagram labels chloroplasts as the site of photosynthesis and mitochondria as the site of aerobic respiration. How should the diagram be judged?

A leaf cell has many chloroplasts. Which activity is this cell especially adapted to perform?

Which organelle is the main site of aerobic cellular respiration?

Root cells usually contain few or no chloroplasts. Which explanation best accounts for this?

. A chart states: “Photosynthesis—mitochondrion; Respiration—chloroplast.” Which revision is best?

A cell has damaged mitochondria but normal chloroplasts. Which function would be most directly reduced?

Which cell is most likely to contain many chloroplasts and many mitochondria?

In which organelle does photosynthesis mainly occur in plant cells?

Which model best represents how a green plant cell handles energy-related processes?

Where does glycolysis, the first stage of cellular respiration, occur?

A student uses one plant in light and another plant in darkness to test whether carbon dioxide is a raw material. What is the main weakness of the design?

Which setup serves as the best control when testing the effect of removing carbon dioxide?

A class tests whether carbon dioxide is needed for photosynthesis. The leaf from normal air turns blue-black, while the leaf from carbon-dioxide-free air remains brown with iodine. Which conclusion is best supported?

A learner tests whether water is needed for photosynthesis using two similar plants. Which plan controls variables best?

Which change would most improve the reliability of a photosynthesis investigation?

Which investigation plan gives the strongest evidence that carbon dioxide is required for photosynthesis?

After an investigation, iodine solution turns a leaf blue-black. What does this result indicate?

Why is a plant commonly destarched before testing whether a raw material is needed for photosynthesis?

In an investigation of whether carbon dioxide is needed for photosynthesis, what is the variable deliberately changed?

Two similar destarched plants are placed in light. One receives normal air; the other is kept with carbon dioxide removed. What should be kept the same for a fair test?