answersLogoWhite

0

Cnidarians

Cnidarians are aquatic animals belonging to the phylum Cnidaria. Common cnidarians include to jellyfish, sea anemones, corals and the Portuguese Man o' War. Questions about all species of cnidarians can be directed here.

500 Questions

What is the body cavity in a cnidarian?

User Avatar

Asked by Wiki User

They have a mouth/anus and that is it.

Where can one buy the Coach purse called the Legacy Leather Mini Tanner Crossbody Bag in bright coral?

User Avatar

Asked by Wiki User

You can purchase the Coach Legacy Leather Mini Tanner Crossbody Bag in Bright Coral from a variety of sources. You can purchase it at Coach retail stores, the official Coach website or authorized Coach dealers and department stores. Additionally, you can also explore online marketplaces and fashion dealer sites {Babareplica} where you may find new and second-hand options. It’s worth mentioning that when purchasing a bag from a third-party source, the authenticity and condition of the bag must be verified to ensure you are getting an authentic Coach product in the color and style you want.

Are night cnidarians endothermic or ectothermic?

User Avatar

Asked by Wiki User

They are a special type of ectotherm called a poikilotherm meaning they have the same body temperature as their ambient surroundings.

What structures determine whether a polyp of obelia is a hydranth or a gonangium?

User Avatar

Asked by Wiki User

A hydranth (feeding polyp) will have a hypostome, mouth and tentacles. A gonangium (reproductive polyp) will have medusa buds and gonotheca. The medusa buds will become free swimming Medusa to sexually reproduce by the female releasing an egg and the male releasing haploid sperm. After fertilization, the zygote develops into a ciliated, swimming planula larva which will settle to the ocean floor attaching itself to the substrate. A new generation of polyps then begins to form through asexual budding.

Habitat of cnidarians?

User Avatar

Asked by Wiki User

In the lava

Does a hydra have blood?

User Avatar

Asked by Wiki User

No, a hydra doesn't have blood. It is a single-cellular animal.

Why are sponges considered to be more primitive than cnidarians?

User Avatar

Asked by Wiki User

It has a single layer of cell.

Lay a paper on a flat surface. With your hands on the surface, push two sides together until you make something that looks like a polyp. Voila! Something similar to a crosssection of a sponge. Think of the paper as cells in a single line.

What is the Cnidarians common name?

User Avatar

Asked by Wiki User

The old name is coelenterate.

What phylum does obelia belong to?

User Avatar

Asked by Wiki User

Phylum Cnidaria

How does waste products leave cnidarians?

User Avatar

Asked by Wiki User

by puting it back out their mouths

Why soft animals like cnidarians don't live on land?

User Avatar

Asked by Wiki User

Cnidarians and sponges receive most of their food from filtering water; they would starve without water. Also, they would most likely crush themselves because of their body weight if they were on land.

Is cnidaria unicellular or multicellular?

User Avatar

Asked by Wiki User

cnidarians are multicellular

How do the buds of an organisums such as hydra compare to the parent?

User Avatar

Asked by Wiki User

the new bud simply detaches from the parent body

Are cnidarians deadly to humans why or why not?

User Avatar

Asked by Wiki User

Yes, for example, Jellyfishes are Cnidarians.

They could sting people.

What kind of digestive system does a hydra have?

User Avatar

Asked by Wiki User

i think a hydra has a incomplete digestive system called the-gastrovascular system

Who are hydra parents?

User Avatar

Asked by Wiki User

The parents are Echidna and Typhon

How do cnidarians and flatworms get food?

User Avatar

Asked by Wiki User

They are filter feeders that draw water into their pores, filter out tiny sea invertebrates that are absorbed and digested, and expel the remaining water in a continuous basis.

How do cnidarians sense?

User Avatar

Asked by Wiki User

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.

What is unique about hydra's?

User Avatar

Asked by Wiki User

Some facts about hydra are that if you cut off one head another grows back. Another fact is that it's a myth.

What are cnidarians' adaptations?

User Avatar

Asked by Wiki User

One adaptation of a cnidarian is the ability to regrow an entire body part. They also use stinging tentacles to catch prey. Jellyfish are cnidarians.
Adaptations? Stinging tentacles (cnidoblasts) - pronounced nie-doe-blasts - sensitivity to light, pulsing motility, life cycle stages that take advantage of protected and food rich environments.

Explain respiration in hydra?

User Avatar

Asked by Wiki User

Well hydra has no specialized organs for respiration but exchange of gases is carried ou' by entire bodyy surface. Oxygen and carbon dioxide diffuse from the body digestive system. Thus an efficient exchange is carried ou by enteron..

Does a hydra have cephalization?

User Avatar

Asked by Wiki User

A hydra does not have cephalization.

Who named the Hydra Constellation?

User Avatar

Asked by Wiki User

The Water Monster or Sea Serpent