Regulated by biological clock. Animals: Melatonin (sleep), alertness, appetite, bowel movements, body temperature. Plants: flowers opening, nectar production, toxin production.
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Photoperiodism
The way an organism responds to change in day length. Animals: HIbernation, change in fur/feather colour. Plants: Germination, growth, reproduction.
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Uses of Plant Defense Cemicals
Quinine: produced by cinchona trees, used to treat malaria. Aspirin: can treat symptoms of disease, produced by willow trees. Digoxin: produced by foxgove, used to treat heart disorders.
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Plant Defenses
1. Attract predators of the pest. 2. Poisons produced which deter herbivores e.g. poison ivy 3. Changing appearance to look unattractive to the pest.
Affects of Pests and Pathogens on Human Food Supply
Can cause famine if they affect a food source which humans heavily rely on.
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Other cards in this set
Card 2
Front
The way an organism responds to change in day length. Animals: HIbernation, change in fur/feather colour. Plants: Germination, growth, reproduction.
Back
Photoperiodism
Card 3
Front
Quinine: produced by cinchona trees, used to treat malaria. Aspirin: can treat symptoms of disease, produced by willow trees. Digoxin: produced by foxgove, used to treat heart disorders.
Back
Card 4
Front
1. Attract predators of the pest. 2. Poisons produced which deter herbivores e.g. poison ivy 3. Changing appearance to look unattractive to the pest.
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