Levels of Organization

3. characteristic of life where an organism gets bigger as a result of an increase in its number of cells
5. Basic unit of life
6. A living thing
9. energy A characteristic of life that all living things require certain nutrients to function.
10. tissue A body tissue that contracts or shortens, making body parts move.
13. something that is not alive and never was
14. system group of organs that work together to perform a specific function
18. A characteristic of life that is not necessary for individuals but is necessary for the survival of a species
19. tissue A body tissue that carries electrical messages back and forth between the brain and every other part of the body.
20. process by which organisms maintain a relatively stable internal environment
21. something is alive or once was
23. tissue A body tissue that covers the surfaces of the body, inside and out
24. division the orderly formation of new cells
25. to environment characteristic of life where an organism has a reaction to something in its environment

1. A collection of tissues that carry out a specialized function of the body
2. Science equipment necessary to see cells, single celled organisms, and many very small multi-celled organisms.
4. A group of similar cells that perform the same function.
7. characteristic of life where a species gains a certain advantage over many generations
8. A cell that contains a nucleus and membrane bound organelles. Plants, animals, fungi, protist, and parasites belong in this group.
10. A group of atoms bonded together
11. tissue A body tissue that provides support for the body and connects all of its parts
12. A tiny cell structure that carries out a specific function within the cell
15. Basic unit of matter
16. tissue types epithelial, connective, muscle, nervous
17. A cell that does not have a nucleus or other membrane-bound organelles. Bacteria belong to this group.
22. enlargement the increase in size of a cell; cells grow to a certain size and then divide