1. Which of the following can happen if the kidneys fail?
a. Toxic wastes can accumulate in plasma.
b. Blood-plasma ion levels can increase.
c. Kidney dialysis may be necessary.
d. All of the above

phosphorus cycle

explanation:

the phosphorus cycle is the way that compounds of the element phosphorus, an essential nutrient, are recycled in the environment. plants absorb phosphorus compounds from the soil, and decaying organic matter, including both plant matter and animal droppings, returns it to the soil. phosphorus is a vital part of atp, the energy currency of all cells, and is vital to all forms of life.

which condition is a cause of impotency in men?

b. the inability of the penis to become erect