The Polio virus usually enters the environment in the feces of someone who is infected
Polio spreads from muscle to the central nervous system by neutral pathways
Question 3, the answer is Zygote
Sorry that's the only one I can answer for sure right now.
Answer:
Active Transport
Explanation:
Active Transport is moving substances from lower concentration to a higher concentration.
Two intermediates of the sterol biosynthesis pathway, isopentenyl diphosphate and dimethylallyl diphosphate, are used by archaea in the biosynthesis of isoprenoids. Isoprenoids are organic compounds <span> which play widely varying roles in the physiological processes of plants and animals.</span>