The key difference is that flagella are whip-like appendages, while flagellates are cells or organisms that possess one or more flagella.
Here's a more detailed breakdown:
Flagella
- Definition: Flagella are microscopic, thread-like structures used for movement. They are essentially cellular appendages.
- Function: Primarily used for motility, allowing cells to swim or move through fluids.
- Structure: Composed of proteins (e.g., flagellin in bacteria).
- Occurrence: Found in both prokaryotic (bacteria and archaea) and eukaryotic cells (e.g., sperm cells).
- Example: The tail of a sperm cell is a flagellum.
Flagellates
- Definition: Flagellates are organisms or cells characterized by having one or more flagella.
- Classification: This term describes a level of organization and a means of motion.
- Diversity: A diverse group including both prokaryotes and eukaryotes.
- Examples:
- Euglena (a type of algae)
- Giardia lamblia (a parasitic protozoan)
Summary Table
| Feature | Flagella | Flagellates |
|---|---|---|
| Definition | Appendage used for movement | Organism or cell possessing flagella |
| Nature | Cellular structure | Living organism or cell type |
| Function | Motility | Movement, feeding, and other cellular processes |
| Examples | Sperm tail, bacterial flagellum | Euglena, Giardia lamblia |
In essence, flagella are the tools, and flagellates are the organisms that use those tools. A flagellate has flagella.
