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It's solar, because s</span>olar energy is a renewable resource that is virtually endless as long as the sun shines.<span />
Because you could easily contaminate the results of the urine if you don't follow exactly what the strict rules dictate This could be a very dangerous thing because if you contaminate the results, then other doctors would think that the patient has some disease that needs to be taken care of which in reality they do not. The patient could also have to go through things or waste money on things that they don't need to because there was something in the urine that wasn't supposed to be there which was added because they didn't follow the strict rules. Then the doctor who contaminated it could be sued for malpractice which is never a good thing.
A climber at altitude has potential energy due to efforts to lift him higher in gravity's grip. His elevation gives him the potential to create kinetic energy if he had the misfortune to fall off
Gates function in a similar way as cell membrane :
cell membrane seperate the external enivironment from the cell while gate even seperate the external environment from the house
cell membrane controls the exit and entry of the cell, gate controls the entry and exit of the house
A seed must be:
- light
- have gliders (wings)
- be formed like a parachute
- not to strongly attached to the flower