B1.4 Keywords
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Molecule
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a group of atoms, either the same or different, bonded together.
Tissue
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a group of cells working together to perform a function.
Organ
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a group of tissues working together to perform a particular function.
Yeast
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a microscopic fungus consisting of single oval cells that reproduce by budding.
Exothermic
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a reaction that releases energy into the environment.
Endothermic
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a reaction that takes in energy from the surroundings.
Rate
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how fast something occurs.
Insoluble
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something that doesn't dissolve in a solvent.
Limiting factor
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something that stops the rate of reaction from increasing past a point.
Concentration
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the amount of particles in a given space.
Photosynthesis
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the conversion of carbon dioxide and water into glucose and oxygen using energy from the sun.
Cardiovascular
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the heart and blood vessels.
Function
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the job or role that something has or is specialised for.
Translocation
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the movement of materials from one location to another in a plant.
Diffusion
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the movement of particles from an area of high concentration to low concentration.
Transpiration
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the movement of water up the plant against the force of gravity.
Respiration
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the process of taking in oxygen and glucose and converting it into carbon dioxide and water.
Products
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the substances made at the end of a reaction.
Metabolism
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the sum of all the chemical reactions in the body.
Epidermis
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the surface tissue.
Chloroplasts
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vesicles full of the photosynthetic pigment chlorophyll.
Collisions
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when one particle bumps into another.
Aerobic
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with oxygen.
Anaerobic
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without oxygen.