Biology

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• 2. they are specialised to carry impulses from receptors to the CNS (4, 2, 8, 2)
• 3. the spreading out of particles of gas, or of any substance in a solution going from an area of high concentration to an area of low concentration (4, 2, 9)
• 4. movement in and out of cells that depends on the concentration of particles on each side of the (4, 2, 3, 8)
• 5. a small group of cells with similar structure and function (4, 2, 1, 6)
• 6. can photosynthesise (4, 4, 9, 2)
• 7. tissues (4, 3, 6, 4, 2)