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

The term autotroph refers to an organism that: a. uses co2 for its carbon source. b. must obtain organic compounds for its carbon needs. c. gets energy from sunlight. d. gets energy by oxidizing chemical compounds. e. does not need a carbon source