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Beyond these basic, universal features, eukaryotic genomes vary dramatically in terms of size and gene counts. Even so, genome size and the number of genes present in an organism reveal little about that organism's complexity (Figure 1).ne pg is equivalent to approximately 1 billion base pairs.) Therefore, genome size is clearly not an indicator of the genomic or biological complexity of an organism. Otherwise, humans would have at least as much DNA as the marbled lungfish, although probably much more.
Cells are considered to be the smallest living organisms in the world. There are single celled organisms and multi-celled organisms. An example of a single celled organism is â¦ an algae, and an example of a multi-celled organism is is a human. 1 person found this useful.his is because there is an upper size limit to cells before they become unable to acquire nutrients through diffusion. Cells really can't be much larger than they are in most multicellular organisms. Therefore, if there's an organism is larger, it isn't because it's cells are bigger but because they have more cells.