Question

please answer this question
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Answer 1

Answer:

Questions no. 9

1.source of light

2.opaque object comes in the path of light

3.screen

Question no 10

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.

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