Where did cnidarians come from?
1 person found this useful
cnidarians, such as jelly fish, sea anemones, hydra, and corals, have tentacles surrounding their mouth. they are a hollow-bodied animal with two celled layers that are organized into tissues. the inner layer forms a digestive cavity where food is broken down. A jelly fish. Cnidarian's have a sting… cell called a cnidnocyte which is the defining feature. ( Full Answer )
A cnidarian is an animal with stinging bristles, like a jellyfish,a portoguese manowar, and coral .
Cindarians usually eat fish that they stun with their tentacles.. "Farming their Food: Almost all cnidarians are carnivorous. Many eat small creatures or trap detritus, plankton and other microscopic titbits. But many also capture and eat large prey. Many cnidarians, however, more supplement their… meals with food provided by photosynthetic zooxanthellae (symbiotic single-celled algae) that they harbour in their tentacles and bodies. These algae produce food from sunlight. In exchange, the cnidrian provides protection and simple minerals. ". http://www.wildsingapore.com/chekjawa/text/p500.htm food ( Full Answer )
cnidarians- some feed by predation. they eat small fish things like that. they also filter nutrients from the water into there body. they can also absorb organic chemicals from the water.
Yes they are! I had the same doubt but I researched and the answer is yes! I LOVE JUSTIN BIEBER! HE IS THE BESTT! I MET HIS VICE PRINCIPAL 2 MONTHS AGO AND I STILL CANT BELIEVE IT!!!
All live under water; most live in the oceans and seas, and a few live in freshwater. But they mostly live in saltwater or oceans. Their examples are Jellyfish, Corals and Sea Anemones
If you mean the longest-lived, gold corals and black corals can be2000 to 4000 years old.
Cnidarians are divided in 3 main groups: the antozoan, syphozoans and cubozoan. The anthozoans are sea anemones and coral and cubazona are jellyfish. Most do not move around, but if necessary they move to get away from predators; the ocean current carries them. But, cubazonas, such as jellyfish, pro…pel themselves to move by opening and closing their bell slowly. ( Full Answer )
They don't really breathe, they use diffusion to get the nutrients they need through their body walls. They use diffusion for respiration, excretion, and circulation.
The characteristics of cnidarians are that they have claws, hard exoskeleton, and reproduce sexually. ------- That answer is just silly. The phylum, cnidaria, includes hydras, jellyfish, sea anemones, and corals. Cnidarians are defined by the fact that they possess cnidocytes (cells that can …either attach or sting) which are often used to grab and immobilize prey, as well as for defense and in rare cases, for locomotion. Cnidarians are diblastic (two layers of cells), with a secreted layer between the inner and outer layer of cells, called the mesoglea. They possess a single gastrovacscular cavity that serves to respirate, disgest, and discharge waste. Commonly, tentacles surround the gastrovascular opening. Cnidarians are predominately radially or bi-radially symmetric. The two common forms of cnidarians are a polyp form (attached, vase-shaped), and a medusa (bell shaped, free swimming) form. Some cnidarians are exclusively sessile (attached to a substrate), exclusively free swimming, or include both forms during their life cycle. ( Full Answer )
Mainly through suspension feeding. Cnidarians use stinging tentacles (nomocytes) to capture their prey. Once the tentacles grab the food it is absorbed in the gastrovascular cavity (stomach) and taken in as nutrients.
the phylum cnidaria consists of about 10,000 species which are mostly marine. the jellyfish and sea anemone belong to this phylum. there bodies are radially symectrical. they capture there prey by stining them with tentacles, there tentacles have special cells that contains a toxin. the only have on…e body opening to food and wate exit and enter through the same opening. the are both aquatic floating and sessile (meaning they don't move). they have a simple nervous system. they have s bodt forms polyp or medusa. ( Full Answer )
A Cnidarians body consists of a gastrovascular cavity with an opening where they ingest food and where waste is released.
Cnidarians, also known as coelenterates, are an extremely varied group of animals. Examples include sea anemones, hydras, jellyfish, corals, and the Portuguese Man of War.
This is straight from www.thefreedictionary.com, so I get no credit at all:. "Any of various invertebrate animals of the phylum Cnidaria, characterized by a radially symmetrical body with a saclike internal cavity, and including the jellyfishes, hydras, sea anemones, and corals. Also called coelen…terate ." ( Full Answer )
cnidarains are animals Actually, they are a type of phylum, which is an invertebrate. Facts- They produce sexually and asexually. Their body is shaped as a vase- Polyp or upside down bowl- Medusa they don't have a brains. they do not have brains there are two body forms- polyp- cant move,… vase shaped example is hydra medusa-move, bell shaped, example is jellyfish ( Full Answer )
not really it dependes on how you look at it. a stingray does have barbs but no tentacles...so it could go either way.
They survive like any other animal: They take in food, digest it, and get rid of waste. Simple as that
No. Cniderians are soft bodied, simple creatures like jellyfish, anemones and corals. Crabs are arthropods.
Cnidarians first paralyze their prey with stinging cells on theirtentacles then they slowly move the food up into the bell to digest. They have no distinct mouth or anus so the food goes in and outaround the same place.
Cnidarians are jellyfish, sea anemones, sea pens, hydras (cnidarian="nettle" in latin, so they have stinging cells). They eat aquatic animals, from protozoa to fish.
Cnidiarian is the word for the phylum of jellyfish and sea anemomes. Some of the requirements to make it into the Cnidaria Phylum are possessing radial symmetry, having no nervous system or head but having a nerve net, and possessing nematocysts (which are stinging cells unique to cnidarians). Nemat…ocysts are also called cnidea, which likely is the basis of the meaning of the name Cnidaria. ( Full Answer )
They're not, that I know of. They may be losing some of their habitat in some areas, but jellyfish, anenomes, coral and other of the invertebrates are thriving in other areas. The ones that i know are endangered are corals. They are being lost through bleaching, and dredging.
Medusae and complex swimming colonies can sense tilt and acceleration by means of chambers lined with hairs which detect the movements of internal mineral grains. If the body tilts in the wrong direction, the animal rights itself by increasing the strength of the swimming movements on the side that …is too low. They also have "little eyes" known as ocelli, which can detect the direction from which light is coming. Although these probably do not form images, their lenses simply produce a clearer indication of the direction from which light is coming. ------ I have to add that most species of box jellyfish have four groups of two complex eyes, and either two or four simpler ocelli, for a total of up to twenty four eyes. The complex eyes are similar to our own and have corneas, lens, and retinas. Tests have demonstrated their ability to navigate obstacles and recognize colors by way of their vision, although it has yet to be demonstrated that they can track prey. Their nervous system is not centralized, but it is a much more complex nerve net than other species of jellyfish. So far, some primitive learning and memory ability has been demonstrated in experiments. ( Full Answer )
Cnidarians are able to absorb the oxygen they need from the surrounding water by diffusion.
cnidarians first paralize their prey with stinging cells on their tenticles then they slowly move the food up into the bell to digest . They have no destinct mouth or anus so the food goes in and out around the same place .
They are not helpful they are f**king jellyfish that sting, and they are the reason i have one testicle.
The excretion process in Cnidarians is accomplished through diffusion. The waste flows out of the gastrovascular cavity after the nutrients go directly to the body.
No, cnidarians are not protostomes or deuterostomes. They fall under (the unranked taxonomic level) Radiata, while both superphylum Deuterostomia and Protostomia are under the (unranked taxonomic level) Bilateria. Features of Bilateria include bilateral symmetry (at some point) and three distinctiv…e germ layers, while Radiata only has two. ( Full Answer )
There are two types (or body plans) of cnidarians. There is the Medusa, which is a Jellyfish, really. And there is a Polyp, which is like an upside-down Jellyfish, if you want it simply. A polyp would be your sea anemone or coral. They spend most of their lives attached to a hard surface underwater.… The main characteristics of cnidarians are they are invertebrates that use stinging cells to paralyze and capture prey and to defend them selves. They reproduce both sexually and asexually. And some of them live in a colony. ( Full Answer )
It's the jelly-like substance that is found between the two layers of cells in a cnidarian. The mesogea is not in all cnidarians though
no --- Well, some do have complex circular ganglia. The cubozoans (boxjellies) also have the ability to sense their environment and reactto it, and possibly even use their complex eyes to persue prey andavoid obstacles. Whether their nervous system is complex enough tofunction at the level of a si…mple mammalian brain is open todebate, but the term, brain, usually connotes a discrete organrather than a radially symetric nervous system. On the other hand, the true jellies (scyphozoans), have a verysimple circular nerve network lacking complex ganglia. It couldhardly be defined as a brain, yet it at least suffices to influencefeeding behavior depending on satiation. ( Full Answer )
Cnidarians do no possess eyes for sight, though many of them are able to sense light vs dark.
The cnidarian groups are broken down first into two large groups; one contains the jellyfish (Medusozoa), and the other contains the corals and anemones (Anthozoa). Within the Medusozoa, there are four basic groups; Cubozoa(box jellies), Hydrozoa(Hyras), Scyphozoa(regular jellyfish) and Staurozoa(s…talked Jellyfish). The orgainization of the Anthozoa is more complex, but basically they are the Hexacorallia and the Octocorallia. The Hexacorallia group consists of sea anemones, hard corals, black corals, 'mushroom corals', and the colonial zooanthids. The octocorralia consists of the 8 tentacled soft corals, and sea pens. ( Full Answer )
Cnidarians (corals, jellyfish and anemones) eat a variety of animal prey, mostly zooplankton. Zooplankton can consist of small crustaceans, larval animals, and fish.
They are polyps or medusas and have radial symmetry. They have a mouth/anus, tentacle, gastrovascular cavity, gastodermis, mesoglea, epidermis, and in polyps, a body/stalk.
Cnidarians do not have spicules. Spicules are commonly found insponges and it is a simply a skeleton which has very tiny splintersthat look like needles.
they have a mouth just like us, that is what helps them to breathe, but they cant breathe if they are out of water unless they are land animals, which most of them probably arent/
Four classes make up the phylum Cnidaria : . Anthozoa, which includes sea anemones and coral . Cubozoa, which includes Portuguese man-of-war . Hydrozoa, which includes jellyfish . Scyphozoa, which includes box jellies There are about 9,000 species of cnidarians. Cnidarians live in aquatic env…ironments and inhabit all depths, from the sandy substrated up to the surface. They can be found from the Great Barrier Reef off the coast of Australia to the contiental shelves of the Arctic Ocean. Interesting fact: Cnidarian bodies have only one open that serves as both mouth and anus. Chnidarian have no brain or a heart. ( Full Answer )
Like all animals; thru their food. They are filter feeders, if that helps. The water carries the little bits of food in their body along with the oxygen they need.
I am pretty sure they do not have blood. They are very simple life forms.
No. Rather, it belongs under Phylum Mollusca, and class Cephalopoda. A Cnidarian has nematodes and cnidocytes, which a cuttlefish does not have.
The origin of the name cnidarians is from the New Latin: cnida, meaning nematocyst and Greek for knide: meaning, nettle.
All cnidarians belong to the taxonomic domain of Eukarya ,which are characterised by having cells with nuclei. Eukarya coversall organisms in the Kingdom Animalia, as well as the KingdomsPlantae, Fungi and Protista.
Cnidarians include corals. Corals provide hiding places for themajority of ocean life - reefs are the most diverse areas in theworld, the ocean's rainforests, if you will. None of it would bepossible without cnidarians!
An animal that exists in a mudusa or poylp state. ----------- A cnidarian is defined by the root of its name, cnida, which is Greek for stinging nettle. All cnidarians, therefore, have cnidocytes, which are the stinging, adhering, or entangling cells that allow them to eat, defend, or move. It… is diploblastic (two layered) and generally they are radially symmetric. Cnidarians are also exclusively aquatic. ( Full Answer )
Yes but not all. Because a mantle is a hard substance that cells secret. Example: clams Hydra ,a type of cnidarian, does not have this. :)
cnidarians are type of invertebrate animals . They are characterized by presence of stinging cells
No , a .spider is not a cnidarian . A spider is an Arachnid . Hydra and jelly fishes are cnidarians .
No , cnidarians are not segmented animals . They are the simplest diploblastic animals . Annelids are segmented animals .