Question

what body part were the bacteria not using because they were constantly being stirred?arms and legsflagella (tail)head

Explanation:

Bacteria use flagella (tail - like structures) for movement. If they are constantly being stirred (i.e., movement is provided externally), they do not need to use their flagella for locomotion. Bacteria do not have arms and legs or a head in the traditional sense as these are features of multicellular organisms like animals.

Answer:

flagella (tail)