Unit 2

2. describes something relating to cells
3. things that are available and ready to be used to meet needs
6. unlike other things or the only one of its kind
8. green substance found in almost all plants
10. something that is completely different from another thing
13. necessary for something to be whole
15. done correctly
18. the result of putting things together
19. the act of taking in oxygen
21. has to do with veins, vessels, or tubes that carry fluids throughout an organism
22. the state of existing
23. simple sugar

1. colorless, odorless gas that occurs naturally
2. the science dealing with how things are made up, how they change, and how they interact
4. a very small amount of matter, formed by combining two or more atoms
5. very tiny living organisms
7. parts of a plant's cells in which photosynthesis takes place
8. describes something that has to do with chemistry
9. substance that gives color to plant or animal tissue
11. absolutely necessary
12. join things together differently than before
14. over and over without end
16. to let go of something
17. the process by which a green plant uses the sun's energy to make food
20. the state of being in a place