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    (Original post by katodizzle)
    Tissue culture is used to grow rare and important plants. Tissues are scraped off the parent plant and placed in agar jelly in a petri dish with nutrients and Auxin. These grow into little plantlets which are then planted into compost. Tissue culture is more expensive than cuttings but it causes less harm to the parent plant.
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    What is a vaccine? Sorry if it's already been asked aha
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    (Original post by rheaj44)
    What is a vaccine? Sorry if it's already been asked aha
    An injection/substance contaning a dead/inactive form of the virus


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    (Original post by rheaj44)
    What is a vaccine? Sorry if it's already been asked aha
    Injecting a dead or inactive pathogen so the white blood cells can produce anti bodies to fight the virus if it enters the body again
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    (Original post by MollieT3)
    Injecting a dead or inactive pathogen so the white blood cells can produce anti bodies to fight the virus if it enters the body again
    Perfect


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    (Original post by Sneakerhead)
    An injection/substance contaning a dead/inactive form of the virus


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    Perfect


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    Compare LDL with HDL.
    Also how can cholesterol be reduced + advantages and disadvantages of the method.
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    (Original post by dhruvap)
    Compare LDL with HDL.
    Also how can cholesterol be reduced + advantages and disadvantages of the method.
    LDL = bad cholesterol
    HDL= good cholesterol (also prevents build up of plaques in blood vessels)
    Lowering cholesterol by doing more exercise.. This increases metabolic rate and breaks down fat.
    Reducing food intake.
    Using statins (drugs) which reduce blood cholesterol level, however there are some side effects and there is a chance of developing type 2 diabetes.
 
 
 
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