Development of multicellular organism

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In summary, the development of multicellular organisms involves a simple repetitive process with different outcomes under different conditions. This is exemplified by the nematode worm C. elegans, where asymmetric divisions and cross talk between cells lead to the formation of different cell types. The HOX complex, a group of genes that are expressed sequentially to determine the anterior-posterior axis, adds to the complexity of development. The fruitfly's mechanosensory bristle also originates from a single sensory mother cell through asymmetric cell division and lateral inhibition. The incorporation of single-celled organisms, such as mitochondria, into the genetic expression of multicellular organisms further adds to their complexity. This may also be related to the presence of introns and exons in
  • #36
Originally posted by cryo
not always just 131, but always THE SAME 131!
Cheese, you make it sound difficult to understand, needed the 131 to construct itself, and didn't need them thereafter, soooo in a VERY energy efficient manner, it eliminated that which it no longer had use for. After all, why keep cells, that are no longer of any use, FED!
 
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  • #37
But if I understand the processes of evolution, an organism can't "eliminate" cells just because there is no more use for them. There has to be an adaptive gradient for them to go. Some reason that organisms without them leave more viable descendents than those with them.
 
  • #38
Originally posted by selfAdjoint
But if I understand the processes of evolution, an organism can't "eliminate" cells just because there is no more use for them. Why Not? There has to be an adaptive gradient for them to go. Yes, less energy! not having to feed them Some reason that organisms without them leave more viable descendents than those with them. Construction (team) of a self replicating organism as to be able to leave the viable descendents
Simply a structural mechanism, like having carpenters build you a house, then they leave, in this case, the cells, they die.

Think about it, life was given, cells died, just so you could be formed, and live.
 
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