If the solute concentration is equal both inside and outside of the cell it is isotonic
Answer:
Stomach acid kills bacteria and parasites that have been swallowed. Your urine flow flushes out pathogens from the bladder area. Skin, tears and mucus are part of the first line of defence in fighting infection. They help to protect us against invading pathogens
Explanation:
A. climate, because temperature and precipitation are directly related to how dry or fertile soil is
