Levels of Biological Organization
Explore the hierarchical structure of living things, from cells to the biosphere, with this Grade 6 science worksheet.
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Levels of Biological Organization
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Read each question carefully and answer to the best of your ability. This worksheet will test your understanding of the levels of biological organization.
1. The basic unit of all living things is the .
2. A group of similar cells working together forms a .
3. Different tissues working together for a specific function make up an .
4. A group of organs that work together to perform major functions is called an system.
5. A complete living thing is known as an .
6. Which of the following is the correct order of biological organization from simplest to most complex?
Organism, Organ System, Organ, Tissue, Cell
Cell, Tissue, Organ, Organ System, Organism
Tissue, Cell, Organ, Organ System, Organism
Cell, Organ, Tissue, Organ System, Organism
7. A population is a group of:
Different species living together
Individuals of the same species living in the same area
All the living and non-living things in an area
Only the non-living things in an area
Match each biological level with its definition.
8. Community
a. All the populations of different species living and interacting in an area.
9. Ecosystem
b. All the living organisms in an area along with the non-living environment.
10. Biosphere
c. The part of Earth where life exists.
11. Explain the difference between a tissue and an organ, providing an example of each.
12. Give an example of an organ system and name at least two organs that belong to it.
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