Biology Module #3

4. The thin, watery cytoplasm near the plasma membrane of some cells
8. Tiny floating organisms that are either small animals or protozoa
9. A relationship between two or more organisms of different species where all benefit from the asociation
11. A relationship between two organisms of different species where one benefits and the other is neither harmed nor benefited
14. A colony that uses holdfasts to anchor itself to an object
15. The region of a eukaryotic cell that contains the cell's main DNA
17. Tiny organisms that float in the water
18. A pigment necessary for photsythesis
19. Hairlike projections that extend from the plasma membrane and are used for locomotion
20. A relationship between two organisms of different species where one benefits and the other is harmed
21. A temporary, foot-like extension of a cell, used for locomotion or engulfing food
22. A light-sensitive region in certain protozoa

1. A reproductive cell with a hard, protective coating
2. A membrane-bounded "sac" within a cell
3. The body of a plant-like organism that is not divided into leaves, roots, or stems
5. Tiny floating photosynthetic organisms, primarily algae
6. A firm, flexible coating outside the plasma membrane
7. A special structure used by an organism to anchor itself
10. A close relationship between two or more species where at least one benefits
12. An organelle containing clorophyll for photosythesis
13. The dense cytoplasm found in the interior of many cells
16. A protozoan that propels itself with a flagellum
19. A substance 'made of sugars' that is common in the cell walls of many organisms