Bio Revision
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What does xylem do? | Xylem carries water, phosphates, potassium, and nitrates (protein) from the roots to the rest of the plant through the inner place of the stem
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| What does phloem do? | Phloem carries sucrose (sugar) and amino acids (to make protein) from the leaves to the rest of the plant through the outer place of the stem.
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| Describe the pathway taken by water through a plant from soil to leaves | It is absorbed in the root hair cells and carried to the root cortex cells, then to the xylem vessels in the stem and finally ends at the mesophyll cells in the leaves.
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| Describe transpiration | It is the evaporation of water at the surface of the mesophyll cells followed by the loss of water vapour from plant leaves through the stomata.
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| 3 factors that affect transpiration | humidity, light temperature
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| describe translocation | movement of nutrients such as glucose and amino acids from the leaves to other parts of the plants through the phloem
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| What is amino acids made of | glucose made from photosynthesis and nitrates made from soil
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| what does amino acids make | protein
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| Whats stoma | holes that plants let the C02 in and oxygen and water vapour out
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| How does stomata closes and opens | the guard cell opens in the daylight and closes in night
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| State the pathway taken by water through root, stem and leaf | root hair cells to root cortex cells to xylem vessels to mesophyll
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| What causes water to be pulled up the stem of plants | The differences of the concentration of solute drives the forces up a plant. The cohesion of water molecules makes them go up.
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| Why does the xylem vessels have a thick wall | It has a thick wall to stiffen itself.
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| What is cohesion? | It's the movement of water molecules bonding together because of the different charges between them.
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| Besides transpiration, what does the plant create to force water vapour going up? | Root pressure created by the root
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| Why do plants need nitrogen | to make protein
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| Why do plants need magnesium | to make chloroplasts
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| What are done with glucose | 1. stored as starch 2. used for respiration 3. changed to sucrose to travel to roots
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| What enters the leaf through stomata during photosynthsis | CO2
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| State the direction of sucrose | leaves to other parts through phloem
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| State the direction of nitrates | roots to other parts through xylem
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| State the differences between xylem and phloem | 1. Xylem carries water, nitrates, and mineral ions; phloem carries amino acids and sucrose 2. Xylem has only one way (roots to leaves); phloem have two ways 3. xylem has no end wall between cells; phloem has walls between cells
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Created by:
amos228
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