Animals breathe in oxygen and breathe out carbon dioxide. Where does the carbon dioxide come from? A. It is produced during photosynthesis. B. It is a product of cellular respiration. C. It is needed to create energy for cells. D. It is created when plants are consumed.

Which of the following is true of cellular respiration but not of photosynthesis? Cellular respiration releases energy from glucose. Cellular respiration releases oxygen gas as a product. Cellular respiration is a process in which glucose is formed. Cellular respiration requires carbon dioxide and water as reactants.

Where does the carbon dioxide for photosynthesis come from in terrestrial plants?A. airB. soilC. lightD. plant's foodE. water

Why are animals important to the process of photosynthesis? A. Animals eat plants, which makes space for more plants to grow. B. Animals digest food, which provides the starting materials for photosynthesis. C. Animals release carbon dioxide, which provides the starting materials for photosynthesis. D. Animals produce energy in the form of heat, which is necessary for photosynthesis to occur.

Write the scientific term:1. A process in which producers consume carbon dioxide andrelease oxygen.(............................)2. A process in which organisms liberate energy in the presence ofoxygen.(............................)Choose the correct answer:1. Photosynthesis, cellular respiration, and combustion are the main processes incarbon–oxygen cycles.a.True b. False2. Carbon is an essential element in bones and proteins.a.True b. False3. Producers use carbon dioxide during cellular respiration.a.True b. False4. No relation between the carbon cycle and the oxygen cycle.a.True b. FalseWhat happens if:1. Burning trees. (according to the amount of oxygen and carbon dioxide)................................................................................................................................................................................................................................2. Elevation of carbon dioxide percentage in the air (open question)................................................................................................................................................................................................................................Topic 8 (L3) Page 219 – 220

What products are formed during photosynthesis? Glucose and OxygenCarbon Dioxide and WaterWater and OxygenCarbon Dioxide and Oxygen