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B3 and B4 - Mocks - Coggle Diagram
B3 and B4 - Mocks
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L13 - Plant Diseases
How to know if a plant is diseased:
- Spots on leaves.
- Areas of decay (rot).
- Growths.
- Malformed stems or leaves.
- Discolouration.
- The presence of pests.
How to identify plant diseases:
- Compare plant to a gardening manual.
- Take infected plants to a lab.
- Using testing kits that contain MAB's.
A plant's growth is stunted if it has a paucity of nitrate ions. Magnesium ions are needed to produce chlorophyll; a deficiency of this is known as chlorosis.
Aphids feed on plants and cause a loss of sap from the phloem; these can be controlled through the use of predators (lacewing).
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L14 - Plant Defences
Physical Defences:
- Cellulose cell walls: Strengthens cells.
- Tough waxy cuticle: Barrier to entry of pathogens.
- Bark: Layers of dead cells that protect against pathogens.
- Leaf fall: Infected leaves are lost every.
Chemical Defences:
- Secrete antibacterial chemicals: Kills pathogens.
- Poisons: Deters predators.
- Secrete oils: Deters aphids.
Mechanical Defences:
- Thorns and Hairs.
- Mimicry.
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L2 - Uses of Glucose
- Used in respiration.
- Converted into insoluble starch for storage.
- Used to produce fats and oils for storage.
- Used to produce cellulose.
- Used to produce amino acids for protein synthesis.
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