1. cells -The cell is the basic unit of structure and function of a living thing.

2. tissue-Tissues are made of a group of similar cells that work together to do a specific job in the body.

3. organs- they are made up of two or more cells that work together to do a job

4. organ system- is a group of organs working together to do a job

5.organism- sum of all the cell and tissue

6. population-is how many of the the same organism there are

7. Ecosystems- are when a population stay in a area

1. cell

2. Tissue

3.organ

4. organ system

5. population

7. ecosystems

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