Biology Unit Review

2. This term refers to a plant's growth in response to light.
4. Specialized cells in the epidermis that regulate gas exchange by opening and closing
8. Protective outer layer of cells on the leaf surface
9. This process involves the movement of molecules against a concentration gradient, requiring energy.
12. Chloroplast-containing cells responsible for carrying out photosynthesis in the leaf
13. This term refers to a plant's growth in response to gravity.
14. This scientist was one of the first to study phototropism in plants.
17. This process involves the loss of water vapor through the stomata of the leaves.
18. These are small openings on the surface of a leaf that allow for gas exchange.
20. This scientist discovered that a chemical signal was responsible for phototropism in plants.
21. This scientist discovered that the chemical signal responsible for phototropism was a growth hormone called auxin.

1. This tissue is responsible for transporting water and dissolved minerals from the roots to the rest of the plant.
3. This tissue is responsible for transporting sugars and other nutrients from the leaves to the rest of the plant.
5. This property of water refers to its ability to stick to itself.
6. Tiny openings on the surface of leaves that allow for gas exchange
7. These are small openings on the surface of a plant stem that allow for gas exchange.
10. This pressure is created when the vacuole of a plant cell is filled with water.
11. This process involves the movement of water across a semi-permeable membrane from an area of high concentration to an area of low concentration.
15. This process involves the movement of molecules from an area of high concentration to an area of low concentration.
16. These specialized cells control the opening and closing of the stomata.
19. This property of water refers to its ability to stick to other surfaces.