Levels of Biological Organization
Explore the hierarchical structure of life from atoms to the biosphere with this Grade 8 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 covers the different levels of organization within living things.
1. The basic unit of structure and function in living things is the .
2. A group of similar cells working together to perform a specific function is called a .
3. Different tissues working together form an .
4. A group of organs that work together to perform major functions in the body is an system.
5. All the living organisms in an area, along with their physical environment, make up an .
6. Which of the following represents 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 → Organism → Organ System
Cell → Organ → Tissue → Organ System → Organism
7. What is the highest level of biological organization that includes all living things and all the places they live on Earth?
Community
Ecosystem
Population
Biosphere
8. A population consists of all the different species living in a particular area.
True
False
Match each level of organization with its description.
9. Cell
a. Individuals of the same species living in the same area.
10. Tissue
b. A group of different species living and interacting in an area.
11. Organ
c. The basic unit of life.
12. Population
d. A group of similar cells performing a specific function.
13. Community
e. Different tissues working together for a specific purpose.
14. Describe the relationship between an organ and an organ system. Provide an example.
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