Organisation of the organism + Movement in and out of cells + Biological molecules and enzymes

1. A group of different tissues that work together to perform specific functions (5)
4. A group of organs working together to perform body functions (5, 6)
5. A group of similar cells that work together to carry out a shared function (6)
8. The net movement of particles from a region of their higher concentration to a region of their lower concentration as a result of their random movement (9)

2. The movement of particles across a cell membrane from a region of lower concentration to a region of higher concentration using energy from respiration (6, 9)
3. A substance which increases the rate of a reaction, without being changed or used up in the reaction (8)
4. The net movement of water molecules from a region of higher water potential to a region of lower water potential, across a partially permeable membrane (7)
7. A protein that functions as a biological catalyst (6)

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