What is the exact location of an earthquake on earth's surface?

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

Match each description with the correct form of energy. 1. energy of an object's position above the ground. 2. stored in the bonds of atoms and molecules 3. stored in the nucleus of an atom 4. energy of vibrating molecules 5. movement of objects used to do work 6. created by vibrations in electric and magnetic fields chemical energy mechanical energy heat gravitational energy light nuclear energy

One brief stimulus of a skeletal muscle may result in a single isolated contractile event, which is called a twitch. one twitch can generate max tension in a muscle. are these statements true or false?