Answer: everything but air, rocks, and water are made up of cells
Explanation:
I'm guessing a protein, since proteins are made of amino acids
Lactic acid buildup is a harmless response to strenuous exercise and will go away on its own. Once the body has used the resulting lactate for energy, the liver breaks down any excess in the blood.
The correct answer is 1 second.
A period is a physical term which describes the time needed for one cycle of vibration to complete and reach a certain point. In this example, the term period refers to the time needed for one complete heartbeat to occur. Since 60 heartbeats occur in 60 seconds, then one heartbeat needs 1 second to complete.
Survival of species and natural selection 500 dollars
