Science in Action: Photosynthesis & Cellular Respiration

  1. Which substances must a green plant obtain from its environment to carry out photosynthesis?
  1. Glucose and water
  2. Oxygen and chlorophyll
  3. Carbon dioxide and water
  4. Carbon dioxide and oxygen
  1. Which organism in the tank produces oxygen?
  1. Snail
  2. Plant
  3. Rock
  4. Water
  1. How are cellular respiration and photosynthesis almost opposite processes?
  1. Photosynthesis releases energy and cellular respiration stores energy.
  2. Photosynthesis removes carbon dioxide from the atmosphere and cellular respiration puts it back.
  3. Photosynthesis removes oxygen from the atmosphere and cellular respiration puts it back.
  4. All of the above
  1. Jimmy is running laps during his physical education class. As he is running, he starts tobreathe harder as his body tries to get more oxygen. Which of the following best explains why Jimmy’s oxygen requirement increases?
  2. His cells use oxygen as their primary source of energy.
  3. His cells need oxygen to increase the levels of sugars in the blood.
  4. His cells need oxygen to help them break down sugars for energy.
  5. His cells use oxygen to transport substances across their cell membranes.

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  1. Vanessa is learning about photosynthesis. Her teacher asks her to draw a diagram showing the process of photosynthesis. What is wrong with Vanessa’s drawing?
  1. The diagram has switched the positions of carbon dioxide and water.
  2. The diagram should show oxygen being both absorbed and released.
  3. The diagram has switched the positions of oxygen and carbon dioxide.
  4. The diagram should show carbon dioxide being both absorbed and released.
  1. Living systems obey the law of conservation of mass. Which of the following statements supports the main ideas of the law of conservation of mass?
  1. The substances that take part in a chemical reaction are the same as the substances that are formed by the reaction.
  2. The masses of the substances that take part in a chemical reaction are less than the masses of the substances that are formed.
  3. The masses of the substances that take part in a chemical reaction are equal to the masses of the substances that are formed.
  4. The masses of the substances that take part in a chemical reaction are greater than the masses of the substances formed by the reaction.
  1. Photosynthesis occurs at the cell level. Which organelle is necessary for photosynthesis?
  1. Golgi apparatus
  2. Chloroplasts
  3. Mitochondria
  4. Endoplasmic reticulum

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