Question

B) Answer the following question: (any 1)
1) How are cactus adapted to survive in a desert?
2) How do plants and animals help each other in the exchange of gases in the
atmosphere?
3) List five activities that are possible due to the presence of air.​

Answer 1

Answer:

1) A cactus is able to survive in the desert due to the following features:

(i) It has long roots that go deep inside the soil for absorbing water.

(ii) Its leaves are in the form of spines to prevent water loss through transpiration.

(iii) Its stem is covered with a thick waxy layer to retain water.

2) Animals, during respiration, take in oxygen and release carbon dioxide gas. Plants on the other hand, utilise this carbon dioxide gas in the process of photosynthesis to produce food and release oxygen in the atmosphere. Thus, we can say that plants and animals help each other in exchange of gases in the atmosphere.

3) Five activities which are possible due to the presence of air are as follows:

•Burning something.

•Winnowing

•Flying kite

•Movement of firkin (toy windmill)

•A ship moving because of sail

MARK ME AS BRAINIEST ANSWER

Answer 2

Question:

1.How are cactus adapted to survive in a desert?

2.How do plants and animals help each other in the exchange of gases in the

How do plants and animals help each other in the exchange of gases in theatmosphere?

3.List five activities that are possible due to the presence of air.

Answer:

• A cactus is able to survive in the desert due to the following features: (i) It has long roots that go deep inside the soil for absorbing water. (ii) Its leaves are in the form of spines to prevent water loss through transpiration. (iii) Its stem is covered with a thick waxy layer to retain water.

• Plants take carbon dioxide during photosynthesis and release oxygen into the atmosphere. Animals and plants take oxygen and release carbon dioxide during respiration. Thus, both plants and animals help each other in the exchange of gases in the atmosphere.

• Burning something.
• Burning something.Winnowing.
• Burning something.Winnowing.Flying kite.
• Burning something.Winnowing.Flying kite.Movement of firkin (toy windmill)
• A ship moving because of sail.