Which of the following is not true of a benign tumor?

A ______ is a change or error in a gene.  This can happen spontaneously or as the result of carcinogens in the environment such as UV radiation.

A(n) _______ is the smallest piece of an element that exhibits the the properties of that element.  It is composed of even smaller subatomic particles.

Which of the following is NOT true of meiosis?

Which of the following is the most abundant inorganic substance in cells?

The _____ system is responsible for body movements, maintenance of posture, and production of body heat.

Which nitrogen base always pairs with cytosine in both DNA and RNA?

Of the items listed, which is not required for the maintenance of life (in humans)?

For each glucose molecule metabolized that undergoes all steps of cellular respiration, the total number of ATP molecules formed is ______.

_____ is a process by which a molecule gains electrons.  In cellular respiration, this happens to oxygen, which results is the production of water.