Photosynthesis and Its Importance

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. Photosynthesis is an endothermic reaction, essential for food production and maintaining atmospheric oxygen. Plants absorb water through roots and carbon dioxide through leaf stomata. Oxygen, a byproduct, is vital for life. Green plants are autotrophs, forming the base of the food chain, supporting all animal life.

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 absorb water.

• To capture light energy.

• To release oxygen.

• To produce carbon dioxide.

Which of the following is a byproduct of photosynthesis?

• Hydrogen

• Oxygen

• Nitrogen

• Carbon dioxide

How do plants obtain water for photosynthesis?

• From sunlight

• From the air

• Through their roots

• Through their leaves

What is the role of the stoma in leaves?

• To store water

• To allow carbon dioxide entry

• To release glucose

• To absorb sunlight

What happens to some of the glucose produced during photosynthesis?

• It is used for photosynthesis.

• It is converted into oxygen.

• It is stored as starch.

• It is released into the air.

What is the significance of oxygen produced during photosynthesis?

• It is essential for animal respiration.

• It is used by plants for growth.

• It is stored in the roots.

• It is a waste product.

What are green plants referred to as in the food chain?

• Scavengers

• Producers

• Decomposers

• Consumers

How do animals depend on plants for survival?

• By using plant roots for shelter

• By absorbing sunlight

• By eating plants directly or indirectly

• By consuming oxygen

What is the main function of photosynthesis in the ecosystem?

• To absorb carbon monoxide

• To generate energy for plants

• To create food and oxygen

• To produce nitrogen