CLASS-9 SCIENCE- ASSERTION AND REASONING

Assertion: A. All living organisms are composed of cells and products of cells.

Reason: B. All cells arise from pre-existing cells.

• both assertion and reason are true and reason is the correct explanation of assertion

• both assertion and reason are true but reason is not the correct explanation of assertion.

• assertion is true but reason is false.

• both assertion and reason are false.

Assertion: A. The cytoplasm is the main arena of cellular activities in both the plant and animal cells.

Reason: B. Various chemical reactions occur in it to keep the cell in the ‘living state’.

• Both are incorrect

• A is correct but B is incorrect

• Both are correct

• A is incorrect but B is correct

Assertion. Collenchyma is thick walled tissue.

Reason. Collenchyma is thickened due to deposition of pectin.

• both true but reason not correct explanation

• assertion true but reason is wrong

• both are wrong

• both are incorrect

Assertion : The number of cells in a multicellular organism is inversely proportional to size of body.

Reason : All cells of biological world are alive.

• both true but reason not correct explanation

• assertion true but reason is wrong

• both are wrong

• both are correct

Assertion : The number of cells in a multicellular organism is inversely proportional to size of body.

Reason : All cells of biological world are alive.

• A is correct but B is incorrect

• A is incorrect but B is correct

• Both are correct

• Both are incorrect

· ASSERTION Chromosmes are constituted by DNA and protein.

REASON: These are thread like structures present in nucleus.

• both assertion and reason are true and reason is the correct explanation of assertion.

• both assertion and reason are true, but reason is not correct explanation of assertion.

• assertion is true, but reason is false.

• both assertion and reason is true.

ASSERTION Golgi bodies store, modify and pack products in vesciles.

REASON They are involved in the formation of lysosomes.

• both assertion and reason are true and reason is the correct explanation of assertion.

• both assertion and reason are true, but reason is not correct explanation of assertion.

• assertion is true, but reason is false.

• both assertion and reason is true.

ASSERTION Rudolf Virchow proposed cell theory.

REASON His cell theory states that all plants and animals are composed of cells.

• both assertion and reason are true and reason is the correct explanation of assertion.

• both assertion and reason are true, but reason is not correct explanation of assertion.

• assertion is true, but reason is false.

• both assertion and reason is true.