As the developing organisms grow, their cells become specialised to carry out a particular function. This specialisation is under the control of genes, and is called differentation.
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cell
the smallest structural and functional unit of an organis, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane
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tissue
Only of the distinct types of material of which animals or plants are made, consisting of specialised cells and their products.
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organ
a part of an organism that is typically self-contained and has a specific vital function.
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organ system
An anatomical structure that consists of organs and organ subclasses responsible for certain body functions
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diffusion
The movement of particles from an area of high concentration to an are of low cocentration down a concentration gradient
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Osmosis
Is the movement of water from an area of high concentration to an area of low concentration through a partially permeable membrane
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Active transport
is the movemnt of particles from an are of low concentration to an are of high concentration against a gradient and it reguires energy.
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independant variable
the things you change in you experiment
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dependant variable
the things you measure in your experiment
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controlled variable
The factor that does not change through out the experiment
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