Levels of Biological Organization
This worksheet covers the hierarchical levels of biological organization from atoms to the biosphere, suitable for Grade 12 science students.
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Levels of Biological Organization
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Read each question carefully and provide your answer in the space provided. For multiple-choice questions, circle the correct option.
1. Which level of biological organization is characterized by a group of similar cells working together to perform a specific function?
Organism
Tissue
Organ System
Cell
2. Which of the following represents the correct order of increasing complexity in biological organization?
Organism → Population → Community → Ecosystem
Cell → Tissue → Organ → Organ System
Molecule → Organelle → Cell → Tissue
All of the above
3. The smallest unit of life is the .
4. A group of different species living and interacting in the same area is called a .
5. The is composed of all the ecosystems on Earth.
6. Explain the difference between a population and a community.
Match each level of organization with its description.
7. Organelle
a. Group of organs working together
8. Organ
b. Functional component within a cell
9. Organ System
c. Structure made of different tissues