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The phylum Porifera, which includes sponges, is considered to be the least complex in terms of organization and cell specialization. Sponges lack true tissues and organs, making them simple in structure compared to other animal phyla.
The order of animal kingdom phyla from simple to complex is generally considered to be Porifera (sponges), Cnidaria (jellyfish, corals), Platyhelminthes (flatworms), Nematoda (roundworms), Annelida (segmented worms), Mollusca (clams, snails), Arthropoda (insects, crustaceans), Echinodermata (starfish, sea urchins), and Chordata (vertebrates).
the order of the phyla are porifera,annelida Cnidaria,and Echinodermata and many more.
The evolutionary order of invertebrate phyla are sponges, cniderians, and bilaterians. The origin of invertebrate phyla begin in the Precambrian times.
For Most Complexity Comparison you need a Base. Most in what category ?Arthropod is a Phylum so I will consider it to be asked in complexity based on Phylum Categories.No, it is not.Out of 9 Phyla it is actually at 7th number. Where 9th is most complex and 1 is least.
yea
The first animal is thought to resemble current phyla such as sponges or cnidarians, based on genetic analyses and fossil evidence. These early animals likely had simple body plans and lacked complex features seen in more derived phyla.
The kingdoms and phyla are the most encompassing categories of taxonomy, followed by class, order, family, genus, and species.
Ban'n chen, al fe research.
I believe it's Rhizopoda. At least that's what yahoo answers said lol
They are not alive and there for do not have a phyla.