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Topic 6- Plants
Root Structure
The epidermis is the outer layer of cells called root hair cells where substances enter the
The root hair cell has a projection which increases its surface area and therefore aids
absorption of water and minerals.
The cortex is a thick layer of irregularly…

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Temperature- at higher temperatures molecules have more kinetic energy so they move faster so the rate of diffusion/
osmosis is increased.
Water Potential- the bigger the water potential gradient the faster the rate of diffusion.
Wind- wind blows away water molecules in the air so the water potential in the…


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