Question
Differentiate between unicellular and Multicellular organisms, with an example of each.
| Unicellular organisms | Multicellular organisms |
| These are the organisms, which have a single cell in their body. e.g. Euglena, Paramoecium, etc. | These are the organisms, which have two or more cells in their body. e.g. Humans, insects, etc. |
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| S. No. | Protein | Function |
| (a) | Collagen | Intercellular ground substance |
| (b) | Antibody | Fight infectious agents |
| (c) | Insulin | Enzyme |
| (d) | GLUT-4 | Enables glucose transport into cells |
| S.no. | Animals | | Morphological features |
| (i) | Crocodile | - | 4-chambered heart |
| (ii) | Sea urchin | - | Parapodia |
| (iii) | Obelia | - | Metagenesis |
| (iv) | Lemur | - | Thecodont |