PLANTS
TRANSPORT IN PLANTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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companion cells on a hot sunny day
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root hair cells on a cool cloudy day
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sieve tube elements during a warm night
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xylem vessels on a warm sunny day
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Detailed explanation-1: -Plant roots absorb mineral salts including nitrates needed for healthy growth. For healthy growth plants need mineral ions including:-Nitrate for producing amino acids which are then used to form proteins.-Magnesium which is needed for chlorophyll production.
Detailed explanation-2: -Like humans, plants need certain mineral ions to stay healthy. These mineral ions are found in the soil and are absorbed by the plant through their roots.
Detailed explanation-3: -The roots absorb water and minerals from the soil and anchor the plant in the ground. The stem supports the plant above ground, and carries the water and minerals to the leaves. The leaves collect energy from the Sun and make food for the plant, using an amazing process called photosynthesis.
Detailed explanation-4: -They cannot be absorbed by diffusion, because the minerals are in very low concentration. Instead, active transport is used. The root hair cells have carrier proteins in their cell membranes. These pick up the mineral ions and move them across the membrane into the cell against the concentration gradient .