Passive transport, for example diffusion, does not require added energy because particles flow from an area of high concentration to an area of low concentration.
The correct answer should be A) Cell theory explains cell behavior where a law would describe it
Theories are used to explain phenomena, while laws just describe what will always happen. Such as the law of thermodynamics that describes what is going on inside a room when heat leaves it.
A - The alveoli have a membrane that is only one cell thick to allow for a short diffusion time to capillaries.
The correct answer is this: IT BECOMES LESS DENSE AND RISES TO THE SURFACE.
The water at the earth's poles are cold and dense. This cold water sink and move along the ocean floor in a current. As it moves towards the equator, the cold water from the poles push up the warmer water, this becomes less dense and rise to the surface.
The science of life and of living organisms, including their structure,
function, growth, origin, evolution, and distribution. It includes
botany and zoology and all their subdivisions.Hope this helps!!
