__________ has a decreased response to repetitive drug doses; whereas __________ is a physical or psychological need for the drug.

Solve the problem. A ladder is resting against a wall.  The top of the ladder touches the wall at a height of 18 ft.  Find the length of the ladder if the length is 6 ft more than its distance from the wall.

Facilitated diffusion is unable to transport molecules against a concentration gradient. 

A nonspontaneous reaction is a reaction that takes place without the continual input of energy from an external source.

Where does the gluconeogenesis take place?

Solve the equation by completing the square. x2+4x+8=0{“version”:”1.1″,”math”:”x2+4x+8=0″}

The immune system mainly works based on

Find the sum or difference.  Write the answer in standard form. -5+2i+8-6i-2i{“version”:”1.1″,”math”:”-5+2i+8-6i-2i”}

Multiply or divide, as indicated.  Simplify the answer. -45-5{“version”:”1.1″,”math”:”-45-5″}

_________ sources of water pollution are relatively easy to monitor and regulate, while _____________ sources of water pollution are difficult to monitor and clean up.