Eduqas Component 3 (with the Immunology and Disease option)

1. A cud-chewing herbivore possessing a 'stomach' divided into four chambers, the largest being the rumen which contains mutualistic microbes (8)
4. Spindle shaped, water conducting cells in the xylem of ferns, confiers and angiosperms (8)
7. Covering of a bony fish's gills (9)
10. Plant tissue containing sieve tube elements and companion cells that allows for the translocation of sucrose and amino acids from the leaves to the rest of the plant (6)

2. A single layer of cells around the pericycle and vascular tissue of the root, each cell having an impermeable waterproof barrier in its cell wall (10)
3. A chemical secreted in response to an action potential at a synaptic knob which carries the chemical signal across the synapse from one neuron to the next, where a new action potential is initiated (16)
5. An organism makes its own complex organic molecules by photosynthesis or chemosynthesis (9)
6. Fluid absorbed between the cells into lymph capillaries as opposed to the blood capillaries (5)
8. Pore mainly found on the lower leaf surface bounded by two guard cells through which gases and water vapour diffuse (7)
9. Filtration under high pressure (15)

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