Environment and Ecology
2015
Ecology & Ecosystems
Which one of the following is the correct sequence of levels of organization of life?
D.Organs, tissues, cells, organism
A.Cells, tissues, organs, organism
B.Cells, organs, tissues, organism
C.Tissues, cells, organs, organism
Correct Answer: Option A
The levels of organization in living organisms follow a hierarchical structure:
- Cells: The basic structural and functional units of life.
- Tissues: Groups of similar cells performing a specific function.
- Organs: Structures composed of different tissues working together to perform a more complex function.
- Organism: A complete living being composed of various organ systems.
Therefore, the correct sequence is Cells → Tissues → Organs → Organism.
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