Oxygen and Carbon Dioxide

The video explains how different organisms respire in various environments. Land plants and animals use oxygen from the air, while aquatic organisms use dissolved oxygen. Soil organisms utilize trapped air in the soil. The balance of oxygen and carbon dioxide is maintained through respiration and photosynthesis, highlighting the interdependence of plants and animals.

How do aquatic animals like fish obtain oxygen?

• Through their skin

• Through their gills

• Through their stomata

• Through their nostrils

What is the role of spiracles in soil-dwelling insects?

• To help them see

• To help them respire

• To help them eat

• To help them move

How do plants contribute to maintaining the balance of oxygen and carbon dioxide in the air?

• By absorbing both oxygen and carbon dioxide

• By absorbing carbon dioxide and releasing oxygen

• By absorbing oxygen and releasing carbon dioxide

• By releasing both oxygen and carbon dioxide

What process in plants counterbalances respiration?

• Digestion

• Fermentation

• Transpiration

• Photosynthesis

Why is the relationship between respiration and photosynthesis important?

• It helps in the growth of plants

• It maintains the balance of gases in the atmosphere

• It provides energy to animals

• It helps in the formation of soil