B. Primary lactose is often seen in crohn's disease!
Between the 2 elements, nitrogen and phosphorus the element abundant in the ocean is the answer
Answer:
Fermentation allows production of energy without oxygen. This is helpful for conserving oxygen.
Explanation:
Selective permeability is the cell wall being particular about what they let in and out of the cell. It is important because if the cell just let any old molecule inside, it would be letting potentially harmful things in.