Cells

2. protective, flexible barrier that controls what goes in and out of the cell
4. A fluid-filled vesicle that contains food, water, and waste
6. rigid structure that surrounds the cell membrane
7. one of the structures in the nucleus that are made up of DNA and proteins
11. deoxyribonucelic acid, a molecules that is present in all living cells and that contains information that determines traits
13. The special, normal or proper activity of an organ or part
14. cells with a nucleus
15. The smallest functional and structural unit of all living things
17. describes the basic characteristics of all cells and organisms

1. cells without a defined nucleus; usually smaller than eukaryotic cells
3. The site of cellular respiration, which releases energy for the use by the cell
5. where photosynthesis occurs
8. structures within a cell that have special functions to keep the cell working
9. the arrangement of parts in an organism
10. Where genetic material is stored and controls the cells growth and reproduction
12. gel-like liquid inside a cell;helps the cell maintain shape and is about 80% water
16. A system of ideas that explains many related observations and is supported by a body of evidence acquired by scientific investigation