These porifera come in a variety of hues with pigment granules.Read More: Animal Kingdom Important Questions Demospongia Examples include Hyalonema and Euplectella.Its form resembles that of a cup or vase.They have some inorganic components and finger-like channels.They are primarily located in the ocean's deepest strata.It contains six-rayed, shiny spicules that can help it reach lengths of 10 to 30 cm.There are sizable sponges or porifera present in this class.The two sub-orders are Homocoela and Heterocoela.Once more, these choanocytes are divided into two orders depending on their structural characteristics.Large cells in this are referred to as choanocytes.The development is aided by coeloblastula or amphiblastula, and the body may be arranged in an asconoid or conoid type fashion.The cylindrical body shape of the animal, which is symmetrical, is the result of a skeleton made of Calcarea spicules.These type of Porifera are tiny and live in shallow water in marine forms.The three classes of Phylum Porifera are as follows: Calcarea Read More: NCERT Solutions For Class 11 Biology Animal Kingdom Later on, as their life cycle and feeding system were discovered, they were included in the animal kingdom. They were initially regarded as plants owing to their green color and their symbiotic relationship with algae. In sexual reproduction, the eggs and sperm are fused together. Again being asexual, they engage in both the budding and fragmentation processes. They are capable of sexual and asexual reproduction. So far, 5000 species of various shapes and colors have been discovered in this phylum.Įach species in Phylum Porifera has unique characteristics. Porifera are the first pore-bearing multicellular animals. Poriferans have the ability to absorb and withhold fluids. They are attached to the substratum and are not able to move. Phylum Porifera has a structure resembling a sponge and is therefore called sponges. They are the lowest multicellular animals belonging to the Kingdom Animalia. Phylum Porifera is a classification of aquatic animals.
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