B3 Keywords Review

2. when the vacuole has lots of water in it and the cell has been stretched
5. the space in the middle of a plant cell
13. a process in which the cells use energy absorbed from the surroundings
14. the stores of the green substance in a plant that is required for photosynthesis
15. the spread of a substance which requires no energy (it is passive)
16. the movement of water (usually from high to low concentration)
17. gradient the comparison of concentrations between two different concentrations
18. a biological catalyst
21. solution used to test for glucose
23. the movement of water along the xylem in a plant
24. solution used to test for protein
25. the movement of sugars and other chemicals made by a plant along the phloem
27. permeable the name given to a membrane that has small holes in it to allow small molecules to pass through it
29. a tool used to sample an ecosystem
31. transport the movement of a substance with the concentration gradient (from high to low) that is a passive process
32. the type of cell in a plant which allows water to travel through it (it has no ends, like a tube)

1. a living factor that can affect an ecosystem
3. an organism that cannot produce its own food (it needs to be a consumer)
4. used to test for starch
6. when the vacuole has some liquid to hold the shape of the cell
7. the green substance in plants which enables photosynthesis to take place
8. the process in which a plant produces its own energy
9. produces the energy in a cell
10. used to test for fat
11. when the vacuole has shrunk due to lack of water
12. the type of cell which transports sugars and has a partially permeable membrane on the end.
19. an organism that produces its own food
20. factors a factor which inhibits a process from taking place
22. a substance which speeds up a chemical reaction
26. the sugar made by plants during photosynthesis
28. a non/living factor that can affect an ecosystem
30. site the specific part of an enzyme which connects to the substance to be catalysed