Resolving the tree of life is a consequential aim of evolutionary biology and during the last several years there was much research devoted to figuring out the relationships among the many earliest branching animal lineages. Another study, however, advised that Porifera had been sister group to all other animals, adopted by Placozoa, and that Ctenophora fashioned a clade with Cnidaria – the outdated clade Coelenterata (Philippe et al. 2009 ) – a way more conventional view of early metazoan evolution.
On this tree, the branches representing different teams of organisms are known as taxa – the process of evolution – discrete adjustments that accumulate from technology to technology – mixed with complex interactions with different life kinds and environments has diversified and expanded life into the myriad species we all know as we speak.
Big shocker: Comb jellyfish – common and intensely fragile jellies with nicely-developed tissues – appear to have diverged from other animals even earlier than the lowly sponge, which has no tissue to talk of. This discovering calls into query the very root of the animal tree of life, which historically positioned sponges on the base.
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