Marine Corps Physical Fitness Test. Fitness is essential to the day-to-day effectiveness and combat readiness of the Marine Corps. The Marine Corps considers physical fitness an indispensable aspect of leadership.
A: Chemical energy is for producing heat in the human body to sustain vital functions, converting solar energy in plants through photosynthesis, producing electrical energy in batteries to power devices and burning fossil fuels in combustion engines to produce heat or motion.
The cell uses chemical energy to make polymers of these molecules, for example to make DNA and RNA strands from nucleotides and proteins from amino acids. Cells also contain inorganic molecules, such as salt and metals in small amounts, and lots of water, too.