YOU ARE LEARNING:
Xylem transports water from the roots to the leaves.
Name the substances that plants must absorb through their roots.
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Water is absorbed from the soil by the root hair cells in the roots. What do we call the movement of water by diffusion across the membrane of the root hair cell?
The mineral ions must move from an area of lower concentration in the soil, to an area of higher concentration in the root hair cell. What is the term that describes this movement?
Xylem tubes from part of the stem of the plant. The plant absorbs water and mineral ions at the roots and then transports the water and mineral ions up the xylem tubes, to the leaves. So the function of the xylem is to transport water and mineral ions up the plant.
Xylem carry water and mineral ions from the roots, up to the leaves. How are the cells arranged to make this happen?
A) They form a tube, a bit like a straw. B) The cells next to each other have holes in to let water through.
Name the substance that strengthens the xylem walls.
The xylem tissue has a particular structure to allow it to carry out transport. Its walls contain lignin to make them very strong, because water can create a lot of pressure!
But how does this tube form? The cells are dead, so the ends of the cell wall break down. This means that the xylem will form into a tube, so that the water can flow.
Name the movement of water from the root, through the xylem and to the leaves.
Complete this expression: Water evaporates through stomata. This is replaced with water ______
When water evaporates at the stomata in the leaves, it creates suction in the xylem which draws up more water from the roots. What word do we use for the evaporation of water at the stomata?