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Subjects
Science State Board
Class 9
Environmental Science
Adaptation in plants, animals and conservation of water

21. Adaptations present in plants and animals

Exercise condition:

7 m.

Examine the statements below and choose the correct answer:

1.

Assertion (A):	In water hyacinth, air chambers are present.
Reasoning (R):	Air chambers provide buoyancy and mechanical support.

Both A and R are false
A is false but R is true
A is true but R is false
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is NOT the correct explanation of A

2.

Assertion (A):	Earthworms use a high frequency sounds called ultrasounds.
Reasoning (R):	Ultrasounds are used to help it live in narrow, underground burrows.

Both A and R are true and R is the correct explanation of A
A is false but R is true
A is true but R is false
Both A and R are true but R is NOT the correct explanation of A
Both A and R are false

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