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Topic Content:
- Prokaryotes Vs. Eukaryotes
- Five Kingdom Classification
- Advantages of the Five Kingdom Classification
- Disadvantages of the Five Kingdom Classification
- Summary
Carolus Linnaeus placed all living organisms into two kingdoms; Plantae and Animalia. The two-kingdom classification was later found to be inadequate because it places organisms with a true nucleus (eukaryotes) with those without a true nucleus (prokaryotes).
Prokaryotes Vs. Eukaryotes
| Prokaryotes: | Eukaryotes: | |
| 1. | No distinct nucleus. | Distinct nucleus present. |
| 2. | No nuclear membrane. | Nuclear membrane present. |
| 3. | Nuclear materials scattered on the cytoplasm. | Nuclear materials not scattered on the cytoplasm. |
| 4. | No membrane-bounded organelles. | Membrane bounded organelles present. |
| 5. | Exist only in simple forms. | Exist in complex forms. |
| 6. | They are primitive. | They are more advanced. |
| 7. | Bacteria and blue-green algae are examples of prokaryotic cells. | Fungi, plant and animal cells are examples of eukaryotic cells. |
Green photosynthetic plants were also placed with non-green plants.
Under the basis of the difference between eukaryotes and prokaryotes cells, as well as the mode of nutrition, scientist R.H Whittaker proposed the five kingdom classification, in 1969.
Biologists now favour classifying organisms using the five-kingdom classification.
The five kingdoms are;
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Gaining
i like this topic cause it considers historical events . such as the first attempt in classifying living organisms by a greek philosopher Aristotle.