Lactic acid is a byproduct of short-term cellular respiration do to exercise, but if you mean lactose, then it's just the enzymes, that your stomach produces
They need energy to produce oxygen
Sperm production is hormonally driven. Brain hormones govern sperm production and are precisely controlled. So I say yes
Answer:
It ensures that the two daughter molecules are exact copies of the parent molecule.
Explanation:
Because alpha ray can penatrate the body deeper than other x rays and do more damage