The ability of sperm cells to move along the ductus deferens is due to
a) gravity
b) peristaltic contractions
c) enzymatic activity
d) hormonal action

option B) peristaltic contractions

Explanation:

The ductus deferens, also known as sperm duct is a narrow tube which lead from the epipidymis to the seminal vesicle. It allows sperm cells to move along it by a rhythmic shortening and lengthening of its muscular walls - known as peristaltic contraction.

Thus, it is due to peristaltic contractions

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