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Similar cells do not cooperate together.
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∙ 11y ago
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What primitive group of animals has no true tissues and no specific distinct shape?
Sponges
Do sea sponges have a diploblastic or triploblastic body organization?
spoges are diploblastic because they have radial symmetryone's having rad. sym. are diplo.and one's having bilateral are triploblasticThis is a true statement, but what we find in animal biology is that there are exceptions to most of the rules. Sponges, or the phylum Porifera do not have true tissues. They are metazoa at their cellular grade of construction, not eumetazoa. If you look at phylogenic tree, you will see that sponges are not directly related to cnidarians, which are radial symmetric and diploblastic. Some sponges are radial symmetric, however the class of sponges, demospongiae, have many species of sponges which have leuconoid body-plans, which are asymmetrical. These are mostly freshwater sponges. So therefore, sponges are not triploblastic or diploblastic, they are neither since they possess no true tissues.
Does phylum porifera have a heart?
No, they are sponges. Actually they are the only animal phyla that does not have any "true tissues".
What kingdom and phylum do sponges belong to?
Sponges or poriferans are animals of the phylum Porifera.Sponges are divided into the following classes mainly according to the compositions of their skeletons:1.Calcarea2.Glass sponges3.Demosponges
Are sponges diploblastic?
Yes. they have two germ layers - or a two - layerd body wall. The epidermis and gastrodermis. Actually sponges lack true tissues and are therefore not diploblastic.
What system do the cnidaria and comb jellies have that sponges lack?
Despite neither jellies nor sponges having central nervous systems, jellies have true tissues. The cells in jellyfish are also bound together, unlike in sponges.
Do sponges have tissues?
no. they have tissue like stuff but not true tissue.
What are Poriferans?
"Poriferans" is the scientific term for sponges, members of the animal phylum Porifera, which means "pore-bearer" in Greek. Sponges are the simplest animals known. Unlike all other animal phyla, which have two or three-layered body plans (diploblastic or triploblastic), sponges have only a single body layer (monoblastic), and no true tissues. They have no appendages and no ability to make any movements, lacking muscle tissues. Sponges are exclusively aquatic.
Which knigdom can develop tissues?
All animals except sponges
What can you about an organism with no tissues?
A unicellular organism lacks tissues, organs, and organ systems.
How are sponges and coelentrates different?
Sponges are of the phylum porifera and are assymetrical invertebrates that have no true tissues due to a lack of cell specialization. Coelenterates are any of the phylum cnidariathat have radial symmetry and are invertebrates. Coelenterates include corals, sea anemones, jellyfish, and hydroids.
What level of organization in missing in sponges?
tissues, organs, and organ system
