Answer:
osmosis- high to low
facilitated diffusion- high to low
diffusion- high to low
bulk transport- low to high
Explanation:
Bulk transport does not involve the movement of molecules from an area of high concentration to an area of low concentration. Therefore, the correct option is D.
The difference in concentration created between two types of solutions, in which one solution has a high concentration of solute and the other solution has a lower concentration of solute is called the concentration gradient.
When the components of a solution move from a region of high concentration to a region of low concentration, they are said to move along the concentration gradient.
The movement of molecules along the concentration gradient does not involve the input of any external energy. This is called passive transport.
When the components of a solution move from a region of low concentration to a region of high concentration, they are said to move against the concentration gradient.
The movement of molecules against the concentration gradient requires the input of external energy in the form of ATP. This is called active transport.
Bulk transport involves the movement of large amounts of molecules through a semipermeable membrane by utilizing the energy of ATP. Thus this is a form of active transport.
Therefore the correct option is D.
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