Which of the following statements is true?
a) Most humans have one kidney, which regulates water and electrolyte balance, removes nitrogenous wastes from the blood, and eliminates the wastes in the urine.
b) The kidneys regulate water and blood glucose in terrestrial vertebrates.
c) The kidneys are paired organs that remove nitrogenous wastes from the urine. d) The kidneys are paired organs that regulate water and electrolyte balance in terrestrial vertebrates.

d) The kidneys are paired organs that regulate water and electrolyte balance in terrestrial vertebrates

Explanation:

The kidney is a bean shaped organ of the body. It is responsible for homeostasis and helps in the regulation of the body’s fluid balance, filters the blood from waste.

Humans have a pair of kidneys that is 2 kidneys. They remove nitrogenous waste products from the blood and deposits it into the urine.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

voluntary muscles are controlled by the cerebellum.