Levels of Biological Organization
Explore the hierarchical structure of life from cells to ecosystems with this Grade 7 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 knowledge of the levels of biological organization.
1. Which of the following is the most basic unit of life?
Organ
Cell
Tissue
Molecule
2. A group of specialized cells that perform a specific function is called a/an:
Organ system
Organism
Tissue
Population
3. The level of organization that includes all the living organisms in an area, along with their non-living environment, is called an .
4. A group of different organs that work together to perform major functions in the body is called an .
5. All organisms are made up of only one cell.
True
False
6. A population consists of all the different species living in a particular area.
True
False
7. List the levels of biological organization from the simplest to the most complex, starting with a cell.
Use the words below to complete the sentences.
8. The highest level of biological organization is the .
9. A single living thing is called an .
10. Different populations interacting in the same area form a .
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