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Question
Which of the following always involves the process of diffusion?
A. The movement of minerals from the soil into root hair cells.
B. The movement of water into the cells of living things.
C. The movement of dissolved oxygen from the surrounding water into an amoeba.
D. The movement of carbon dioxide from the air into leaf cells.
A. The movement of minerals from the soil into root hair cells.
B. The movement of water into the cells of living things.
C. The movement of dissolved oxygen from the surrounding water into an amoeba.
D. The movement of carbon dioxide from the air into leaf cells.
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Solution
The correct option is D Only C and D
Diffusion is a process of movement of substances from a region of its higher concentration to a region of its lower concentration. Among the options listed, only options C and D occur due to diffusion alone at all times. Movement of water along the concentration gradient through a membrane (semi-permeable) is called osmosis and the movement of minerals from the soil into root hairs happens as a result of active transport.
Diffusion is a process of movement of substances from a region of its higher concentration to a region of its lower concentration. Among the options listed, only options C and D occur due to diffusion alone at all times. Movement of water along the concentration gradient through a membrane (semi-permeable) is called osmosis and the movement of minerals from the soil into root hairs happens as a result of active transport.
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