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Which animal has radial symmetry?
Cnidarians are true radially symmetrical animals. They include jellyfish. Echinoderms (like starfish) also display radial symmetry. It is important to note that the larvae of echinoderms are bilaterally symmetrical and that Echinoderms evolved from a bilaterally symmetrical group.
Are seahorses in the echinoderms or cnidarians group?
Cnidaria
Which animal is not a arthopods?
Sponges, Cnidarians, Mollusks, and Echinoderms are not Arthropods.
According to the diagram below which animal class or classes have radial symmetry?
Cnidarians and echinoderms
What are some resources from the ocean floor?
fish, mollusks, worms, crustaceans, echinoderms, sponges, tunicates and other cnidarians
What cnidarians that are motile?
By swimming using tentacles
What groups of animals have radial symetry?
Echinoderms (ex: starfish), cnidarians (ex: jellyfish) and and some vermiforms have longitudinal radial symmetry.
In what time period did cnidarians evolve?
The Cnidarian classification group evolved in about 1824.
What are all of the invertibrate groups?
An invertebrate is an organism that lacks a backbone. The 6 groups of invertebrates are sponges, cnidarians, worms, mollusks, echinoderms and arthropods.
Is a lobster a cnidarian?
no, it is a vegetarian: D
Do cnidarians have spicules?
No, cnidarians do not have spicules. Spicules are small, needle-like structures made of calcium carbonate or silica that are found in some sponges and echinoderms for support and defense. Cnidarians, such as jellyfish and corals, have a different type of support structure called a mesoglea.
Why are echinoderms thought to have evolved from bilaterally symmetrical ancestors?
Echinoderms are thought to have evolved from bilaterally symmetrical ancestors because their larval forms exhibit bilateral symmetry. Over time, echinoderms undergo a process called pentaradial symmetry, where they develop a five-point radial symmetry characteristic of adult echinoderms. This suggests a modification from bilateral to radial symmetry during evolution.
