Fill in the blank with the correct word or phrase.

Darwin proposed a new theory of how evolution works, which he called

whats in the blank

Why are common names a problem for scientist?

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.

What factors contribute to the effect an environmental toxin has on the human body?