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Cnidaria is a phylum under kingdom Animalia containing over 11,000 species of aquatic animals found both in fresh water and marine environments (predominantly the latter), including jellyfish, hydroids, sea anemones, corals and some of the smallest marine parasites. Their distinguishing … Meer weergeven
The term cnidaria derives from the Ancient Greek word knídē (κνίδη “nettle”), signifying the coiled thread reminiscent of cnidocytes. … Meer weergeven
Sexual
Cnidarian sexual reproduction often involves a complex life cycle with both polyp Meer weergevenMany cnidarians are limited to shallow waters because they depend on endosymbiotic algae for much of their nutrients. The … Meer weergeven
Cnidarians form a phylum of animals that are more complex than sponges, about as complex as ctenophores (comb jellies), and less … Meer weergeven
Basic body forms
Most adult cnidarians appear as either free-swimming medusae or sessile polyps, and many Meer weergevenCnidarians were for a long time grouped with Ctenophores in the phylum Coelenterata, but increasing awareness of their … Meer weergeven
Fossil record
The earliest widely accepted animal fossils are rather modern-looking cnidarians, possibly from around 580 million years ago, although … Meer weergevenWikipedia-tekst onder CC-BY-SA-licensie Cnidarian | Definition, Life Cycle, Classes, & Facts | Britannica
- cnidarian, any member of the phylum Cnidaria (Coelenterata), a group made up of more than 9,…
The phylum Cnidaria is made up of four classes: Hydrozoa (hydrozoans); Scyphozoa (scyphozoans); Anthozoa (anthozoans); and Cubozoa (cubozoans). All cnidarians share several attributes, supporting the theory that they had a single origin. Variety and symmetry of body for…
- cnidarian, any member of the phylum Cnidaria (Coelenterata), a group made up of more than 9,…
Cnidarians Portal | Britannica
WEBThe phylum Cnidaria is made up of more than 9,000 living species, mostly marine animals. Corals, jellyfish, sea anemones, and sea fans are all cnidarians.
11.5: Cnidarians - Biology LibreTexts
WEBCnidarians are invertebrates such as jellyfish and corals. They belong to the phylum Cnidaria. All cnidarians are aquatic. Most of them live in the ocean.
Anatomy of cnidarians | Britannica
WEBCnidarians are carnivorous, feeding mostly on zooplankton but also on small crustaceans, fish eggs, worms, smaller cnidarians, and even small fish. Cnidarians range in size from nearly microscopic to more than 100 …
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ADW: Cnidaria: INFORMATION
WEBCnidarians are radially or biradially symmetric, a general type of symmetry believed primitive for eumetazoans. They have achieved the tissue level of organization, in which some similar cells are associated …
5.8.3: Phylum Cnidaria - Biology LibreTexts
WEBPhylum Cnidaria includes animals that show radial or biradial symmetry and are diploblastic, that is, they develop from two embryonic layers. Nearly all (about 99 percent) cnidarians are marine …
Introduction to Cnidaria - University of California …
WEBThere are four major groups of cnidarians: Anthozoa, which includes true corals, anemones, and sea pens; Cubozoa, the amazing box jellies with complex eyes and potent toxins; Hydrozoa, the most diverse group with …
Cnidarians: Diversity and Evolution of Cnidarian Visual Systems
WEB29 mrt. 2023 · Cnidarian photosensory systems exemplify distributed visual systems and are intriguing for a rich array of ecological and evolutionary questions. Here, we review what is known of photosensory systems in Cnidaria, in both larval and adult stages.
28.2: Phylum Cnidaria - Biology LibreTexts
WEBDescribe the progressive development of tissues and their relevance to animal complexity. Phylum Cnidaria includes animals that show radial or biradial symmetry and are diploblastic, that is, they develop from two …
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