Photosynthesis Concepts and Processes

Photosynthesis is crucial for life on Earth, providing food and oxygen. It involves green plants and algae using sunlight to convert carbon dioxide and water into glucose and oxygen. This process occurs in chloroplasts with chlorophyll capturing light energy. The glucose produced feeds plants and animals, while oxygen is a vital byproduct. Photosynthesis is essential for the food chain, supporting both herbivores and carnivores.

Why is photosynthesis crucial for life on Earth?

• It creates sunlight.

• It absorbs nitrogen.

• It generates oxygen and food.

• It produces carbon dioxide.

What is the primary role of chlorophyll in photosynthesis?

• To release oxygen.

• To absorb water.

• To produce glucose.

• To capture light energy.

Which of the following best describes photosynthesis?

• An endothermic reaction.

• A process that releases energy.

• An exothermic reaction.

• A process that does not require energy.

How do plants obtain water for photosynthesis?

• From sunlight.

• From the air.

• Through their leaves.

• Via their roots.

What is the role of the stoma in photosynthesis?

• To store oxygen.

• To allow carbon dioxide entry.

• To release glucose.

• To absorb sunlight.

What happens to some of the glucose produced in photosynthesis?

• It is used for respiration.

• It is converted into oxygen.

• It is turned into carbon dioxide.

• It is released into the air.

Which of the following is a byproduct of photosynthesis?

• Nitrogen.

• Hydrogen.

• Carbon dioxide.

• Oxygen.

Why are green plants referred to as producers?

• They produce their own food.

• They rely on animals for food.

• They decompose organic matter.

• They consume other organisms.

What is the significance of oxygen produced in photosynthesis?

• It is essential for animal respiration.

• It is used by plants for photosynthesis.

• It is a waste product with no use.

• It is stored in the soil.

How do animals depend on photosynthesis?

• They use sunlight directly.

• They rely on the oxygen and food produced.

• They absorb chlorophyll.

• They produce glucose.