I am pretty for sure the answer is C.
Pretty sure A: chemical energy from broken bonds is transformed into mechanical energy for muscles
It’s someone’s opinion so the key word “best hints that it an opinion so to be objective is to be unbiased. If you're objective about something, you have no personal feelings about it.
Sorry if I’m wrong but I believe it’s the cardiovascular and lymphatic system
Hope this helps!
Answer:
Answer:
THE GREAT SPERM RACE:
A sperm's race to fertilize an egg is not so easy. Out of about 250 million sperm ejaculated into the human vagina during intercourse, not more than one in a hundred will survive the Great race to the end due to the hurdles it has to face in the hostile, ACIDIC CHAMBER to the cervix (it has hundreds of tiny branching tunnels that can trap, crush and slowly kill sperm).
If ovulation is not occurring soon the sperm will "drown in a thick flow of cervical mucus
