Answer: D
Explanation: just took the quiz
With sufficient stimulation, mature sperm<span> travel </span>from<span> the epididymis </span>through<span> the vas deferens, a muscular tube, which propels </span>sperm<span> forward </span>through<span> smooth muscle contractions. I hope this helps :D</span>
Answer:
c
Explanation:
Natrual selection is survival of the fittest, so only the best suited for that environment survive.
North of the arctic circle
The digestive tract overlaps in many layers (It can even reach microsocpic overlaping) allowing it to fit inside a person's body.
