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Biology GCSE EDEXCEL; SB5 Plant Defense
Hey everyone!
Today's Episode was the first of the Biology Series I'll be covering SB5 Plant defense and disease. I'll be covering Plant disease in the next episode so I can focus more today on defense...
Now, answers to today's quiz:
Name 3 Physical barriers and give examples
Answer may range from Trichomes, Spines, Tree Bark, Thick cuticle, Wax Cuticle.
Examples: Nettle leaves, Tree, Cacti, Cabbage Leaves.
Name 3 Chemical barriers and give examples
Answer may range from Raphides, Chemical Irritants, Lignin, Lectin.
Examples: Kiwi, Nettles, Trees, Garlic
What is a cross species alliance and how can it be used as defence for plants (cotton)
Cross species alliance is a mutually beneficial relationship between 2 organisms of different species. Cotton releases chemical compounds which attract parasitic wasps to lay eggs in caterpillars.
What is a chemical barrier
A Plants use of chemical compounds to defend itself against herbivores.
Now last question, I didn’t mention the definition but you should know this by now. Define pathogen?
A pathogen is a microorganism, bacteria, virus or fungi which causes illness.
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By Malika MamajonovaHey everyone!
Today's Episode was the first of the Biology Series I'll be covering SB5 Plant defense and disease. I'll be covering Plant disease in the next episode so I can focus more today on defense...
Now, answers to today's quiz:
Name 3 Physical barriers and give examples
Answer may range from Trichomes, Spines, Tree Bark, Thick cuticle, Wax Cuticle.
Examples: Nettle leaves, Tree, Cacti, Cabbage Leaves.
Name 3 Chemical barriers and give examples
Answer may range from Raphides, Chemical Irritants, Lignin, Lectin.
Examples: Kiwi, Nettles, Trees, Garlic
What is a cross species alliance and how can it be used as defence for plants (cotton)
Cross species alliance is a mutually beneficial relationship between 2 organisms of different species. Cotton releases chemical compounds which attract parasitic wasps to lay eggs in caterpillars.
What is a chemical barrier
A Plants use of chemical compounds to defend itself against herbivores.
Now last question, I didn’t mention the definition but you should know this by now. Define pathogen?
A pathogen is a microorganism, bacteria, virus or fungi which causes illness.
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