What is the difference between Porifera and cnidarians?
Compare the structural differences between Porifera and Cnidaria. Poriferans do not possess true tissues, whereas cnidarians do have tissues. Because of this difference, poriferans do not have a nerve net or muscle cells for locomotion, which cnidarians have.
What is the difference between Coelenterata and platyhelminthes?
The key difference between Coelenterata and Platyhelminthes is based on the germ layers of the organism. Coelenterates are diploblastic invertebrates whereas Platyhelminthes are triploblastic invertebrates.
What is the difference between Porifera and platyhelminthes?
Porifera (sponges) have specialized cells and an endoskeleton but lack true tissues and body symmetry. Cnidaria (jellyfish and corals) have tissue-level organization and radial symmetry. Platyhelminthes (flatworms) have a mesoderm cell layer, simple organ systems, cephalization, and bilateral symmetry.
What are characteristics of phylum Porifera?
Characteristics of Phylum Porifera Only a few are found in freshwater. They are either radially symmetrical or asymmetrical. Their body is usually cylindrical. The scleroblast secretes spicules while spongin fibres are secreted by spongioblasts.
How are Coelenterates different from other invertebrates?
Answer. Explanation: an aquatic invertebrate animal of the phylum Cnidaria (formerly Coelenterata), which includes jellyfishes, corals, and sea anemones. They are distinguished by having a tube- or cup-shaped body.
What are three differences between the polyp and medusa forms of coelenterates?
Polyp have a tubular shape and are fixed at their base, with the mouth present at the other end of the tube facing the water. Medusa have a bell shape, with tentacles hanging down. Polyp do not have a manubrium. Medusa of the Hydrozoa class present a tube hanging down from the bell known as manubrium.
What are the general characteristics of porifera?
What are the characteristics of phylum Porifera?
- These are pore-bearing multicellular animals.
- The body has no organs.
- They exhibit holozoic nutrition.
- The body is radially symmetrical.
- They can regenerate their lost parts.
What are the similarities and differences between animals in the phylum Porifera and Coelenterata?
| Porifera | Ctenophora |
|---|---|
| Animals show cellular level of organisation. | Animals show tissue level of organisation. |
| They are asymmetrical. | They are radially symmetrical. |
| Digestion is intracellular. | Digestion is extracellular and intracellular. |
| Fertilisation is internal. | Fertilisation is external. |