Give the steps involved in photosynthesis.

Outline the functioning of kidney dialysis machine?

An organism X having breathing organs A lives on land. When organism X goes under water, it cannot survive for a long time unless carrying an oxygen cylinder. On the other hand, the organism Y having breathing organs B always lives in water and if taken out of water, it dies after a short while. A third organism Z having breathing organs C and D which lives on the banks of ponds, lakes and rivers can survive on land as well as in water equally well.

1. What could organism X be? Name the breathing organs A.
2. What could organism Y be? Name the breathing organs B.
3. What could organism Z be? Name the breathing organs C and D.
4. Out of X, Y and Z, which organism is.

1. Amphibian,
2. Aquatic,
3. Terrestrial?

How does food prepared by leaves is utilized by roots? Explain.

Name the main organs of the human digestive system in the order they participate in the process of digestion. Describe how digestion of carbohydrates and proteins take place in our body.

Draw a neat labelled diagram of the human excretory system.

‘Aerobic respiration produces more ATP than anaerobic respiration’. Justify this statement.

Distinguish between photosynthesis and respiration.

Explain the mechanism of photosynthesis.

Name the conducting structures present in plants.