Cellular Respiration and Photosynthesis in Ecosystems

What is the primary role of cellular respiration in organisms?

• To break down food molecules and oxygen to transfer energy to muscles

• To convert carbon dioxide and water into glucose and oxygen

• To provide energy for plant growth

• To cycle carbon among the biosphere, atmosphere, hydrosphere, and geosphere

Which process does not require oxygen?

• Anaerobic respiration

• Aerobic respiration

• Photosynthesis

• Cellular respiration

What is the main energy source used in photosynthesis?

• Sunlight

• Oxygen

• Glucose

• Carbon dioxide

How do photosynthesis and cellular respiration contribute to the carbon cycle?

• By exchanging carbon among the biosphere, atmosphere, oceans, and geosphere

• By breaking down food molecules and oxygen

• By maintaining body temperature

• By providing energy for plant growth

What is the significance of understanding cellular respiration and photosynthesis in ecosystems?

• They are responsible for most of the energy required for life processes

• They only occur in plants

• They do not contribute to the cycling of carbon

• They are not essential for metabolic activities