is porifera triploblastic or diploblastic?
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triploblastic) and body plans: With the exception of the phylum Porifera (sponges), all animals have tissues that derive from embryonic germ layers. Those with two embryonic germ layers are diploblastic; those with three embryonic germ layers are triploblastic.
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Cnidarians are not considered to have a coelom because they are diploblastic, so they don't have any mesodermic tissue. Cnidaria are a phylum consisting of aquatic animals like jellyfish, anemones, and corals. ... Cnidarians have an incomplete digestive tract, which means that they eat and excrete from the same opening.
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With the exception of the phylum Porifera (sponges), all animals have tissues that derive from embryonic germ layers. Those with two embryonic germ layers are diploblastic; those with three embryonic germ layers are triploblastic.
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The phylum Cnidaria (sea anemones, corals, hydras and jellyfish) is the likely sister group of the triploblastic Bilateria. Cnidarians are generally regarded as diploblastic animals, possessing endoderm and ectoderm, but lacking mesoderm.
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In regard to its ploidy, there are three types of cycles; haplontic life cycle, diplontic life cycle, diplobiontic life cycle. These three types of cycles feature alternating haploid and diploid phases (n and 2n). The haploid organism becomes diploid through fertilization, which joins of gametes.
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Sponges are unsymmetrical or radially symmetrical, with many cell types but no distinct tissues; their bodies contain numerous pores and sharp protective spicules. Coelenterates (phylum Cnidaria) are radially symmetrical, with two tissue layers (ectoderm and endoderm) surrounding an all-purpose gastrovascular cavity.
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There are three main categories of life cycles in multicellular organisms: diploid-dominant, in which the multicellular diploid stage is the most obvious life stage (and there is no multicellular haploid stage), as with most animals including humans; haploid-dominant, in which the multicellular haploid stage is the ...
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- Sponges and coelenterates are bisexual animals- that possess both male and female reproductive organs, are hermaphrodites. So, the incorrect statement is 'Option D- Sponges and coelenterates are unisexual animals'.
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['They are bilaterally symmetrical and triploblastic.', 'Chordates are coelomate and show an organ system level of organisation.', 'They have the characteristic notochord, dorsal nerve cord, pharyngeal slits.', 'Also, they have a post-anal.']
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Algae could be both unicellular and multi-cellular, whereas seaweeds are necessarily multi-cellular. All the seaweed species are autotrophic, whereas some algal species rely on other external food materials. ... Marine algae can distribute over shallow as well as deep waters, while seaweeds mostly inhabit shallow waters.
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There are some unicellular organisms that carry out both heterotrophic and autotrophic nutrition, meaning they are mixotrophic. Such is the case of euglena gracilis (below), which carries out photosynthesis in its chloroplasts as well as also feeding on detritus or smaller organisms by endocytosis.
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Sponges are aquatic invertebrates that make up the phylum Porifera.
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Among animals, sponges show the simplest organization, having a single germ layer. Although they have differentiated cells (e.g. collar cells), they lack true tissue coordination. Diploblastic animals, Cnidaria and Ctenophora, show an increase in complexity, having two germ layers, the endoderm and ectoderm.
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Sponges are similar to other animals in that they are multicellular, heterotrophic, lack cell walls and produce sperm cells. ... All sponges are sessile aquatic animals, meaning that they attach to an underwater surface and remain fixed in place (i.e., do not travel).
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Most chytrids are unicellular; a few form multicellular organisms and hyphae, which have no septa between cells (coenocytic). They produce gametes and diploid zoospores that swim with the help of a single flagellum. The ecological habitat and cell structure of chytrids have much in common with protists.
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The flatworms, like the sponges (Phylum Porifera) and Phylum Cnidaria (Hydra, jellyfish, corals, and sea anemones) are multicellular. However, the flatworms are more complex in structure than either of the two other groups.
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Brown algae (Laminaria, Fucus) All Brown algae are multicellular and all go through an alternation of generation: diploid (2n) and haploid (n) phases alternate. The haploid and diploid life form look very different, they are heteromorph.