Assertion : Bacteria do not always move with the help of flagella.
Reason : Flagellated bacteria employs rotary motion of flagellum when it moves.

Options

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

Answer

B

Explanation

Bacteria may or may not have surface appendage. Certain bacterial species bears flagella which are organs for locomotion. Bacterial flagellar motion in rotatory in nature. The rotation of flagella can be clockwise or counter clockwise. When the flagella rotate clockwise forward motion ceases and in anti clockwise rotation of flagella impart forward motion.