31. Assertion : Cell wall is not found in animal cell. Reason : Animal cells are covered by cell membrane.

(a)      If both the assertion and the reason are true and the reason is a correct explanation of the assertion

(b)      If both the assertion and reason are true but the reason is not a correct explanation of the assertion

(c)       If the assertion is true but the reason is false

(d)      If both the assertion and reason are false

(e)      If the assertion is false but reason is true

Ans. (a)      Cell wall is characteristic feature of plant cells. Cell wall absent is animals. Animals cells covered by cell membrane.