Mi mamá va _______ aeropuerto para recoger (pick up) mis abuelos.

¿________________ dinero tiene Bill Gates?

Fats are digested by enzymes called

Yo no tomo vino. Yo ___________________________. (I don’t drink it)

I leave at 8:00. (salir)

Blood pH is

The patella and femur form a ___ joint.

Isotopes differ fron each other only in the number of electrons contained

The lower the pH, the higher the hydrogen ion conentration.

Positive feedback mechanisms tend to increase the original stimuls.