PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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to absorb water and minerals from the soil
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to provide additional support in anchoring the plant
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to absorb nutrients from the soil
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to grow into longer roots
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Detailed explanation-1: -Root hair absorbs water from soil through osmosis. Water will be absorbed by root hairs by osmosis as the environment in the soil is hypotonic. This kind of absorption takes place passively. The water can easily move from the region of higher concentration to the low concentration without expenditure of energy.
Detailed explanation-2: -The root hairs take water from the soil by a process called osmosis. In osmosis, water molecules move from a region of higher concentration to a region of lower concentration through a semi-permeable membrane. The concentration of the water molecules is lower in the root hair than in the soil.
Detailed explanation-3: -So, the root hairs are suited for absorbing water from soil because they have a large surface area, have a semi-permeable membrane, and contain a solution of higher concentration than the surrounding water.
Detailed explanation-4: -Root hairs form in the zone of differentiation and this is where they begin to poke out into the soil to absorb water and mineral nutrients. Root hairs greatly increase the root surface area and therefore increase the ability of a plant to absorb water and nutrients.
Detailed explanation-5: -Roots have numerous root hairs that increase the surface area for the absorption of water and minerals. These root hairs are in contact with the water present in the soil. Water enters the cells of the root hair by the process of osmosis.