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Multicellular organism - Wikipedia, the free encyclopedia (165 words) |
 | Multicellular organisms are those organisms containing more than one cell, and having differentiated cells that perform specialized functions. |
| A group of similarly differentiated cells performing a function in a multicellular organism is known as a tissue. |
| Multicellular organisms can suffer from cancer when cells fail to regulate their growth within the normal program of development. |
| Stage 5: Telesensory (8032 words) |
| And it is clearly possible, because somatosensory animals already have already evolved the mechanism of embryological development to serve as their biological behavior guidance system, and they have already evolved neurons for transmitting and regulating the signals from sensory input that caused behavioral output. |
| Since every cell in a (sexually reproducing) multicellular animal derives from the same fertilized egg cell and has the same genetic structure, the basic challenge in constructing a complex body or nervous system is to make the cells become different in their behavior and yet coordinate them so that they work together as a whole. |
| Multicellular plants had evolved long before the Cambrian period, and what accounts for the fossils of animal skeleton that mark the beginning of that period is the evolution of the mechanism of embryological development (that is, the biological behavior guidance system for multicellular animals). |
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