What are the 5 classes of phylum Cnidaria?
What are the 5 classes of phylum Cnidaria?
CNIDARIA
- Anthozoa. Corals and sea anemones.
- Scyphozoa. Swimming Jellyfish.
- Staurozoa. Stalked Jellyfish.
- Cubozoa. Box jellyfish.
- Hydrozoa. Hydroids and siphonophores.
What organisms belong to phylum Cnidaria?
Cnidariacorals, sea anemones, jellyfish, and relatives. The Phylum Cnidaria includes such diverse forms as jellyfish, hydra, sea anemones, and corals.
What are the three main classes of phylum Cnidaria?
Cnidarians are divided into three major classes. These are the Hydrozoa (hydras and other colony-forming species), the Scyphozoa (jellyfish), and the Anthozoa (sea anemones and corals).
What organisms are found in the largest class of phylum Cnidaria?
The largest class of cnidarians is the Anthozoa (the flower animals); the class is all marine and comprises about 6,000 species. This group includes the soft and stony colonial corals, solitary sea anemones, gorgonians (sea fans, pens, and whips), and sea pansies.
Which of the following is an Anthozoan in the phylum of Cnidaria?
Anthozoa is included within the phylum Cnidaria, which also includes the jellyfish, box jellies and parasitic Myxozoa and Polypodiozoa.
Is Coral a phylum Cnidaria?
Cnidaria
Sea anemones and corals/Phylum
What unique characteristics define phylum Cnidaria?
Phylum Cnidaria includes animals that exhibit radial or biradial symmetry and are diploblastic, meaning that they develop from two embryonic layers, ectoderm and endoderm. Nearly all (about 99 percent) cnidarians are marine species.
What are the unique structures of phylum Cnidaria?
Cnidarians have two distinct body plans, the medusa (a) and the polyp (b). All cnidarians have two membrane layers, with a jelly-like mesoglea between them. Animals in this phylum display two distinct morphological body plans: polyp or “stalk” and medusa or “bell” (Figure 2).
Which of the following are characteristics of the phylum Cnidaria?
Cnidarians share several basic characteristics. All Cnidaria are aquatic, mostly marine, organisms. They all have tentacles with stinging cells called nematocysts that they use to capture food. Cnidarians only have two body layers, the ectoderm and endoderm, separated by a jelly-like layer called the mesoglea.
What marine organisms are in this class Cnidaria?
Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans.
What is the phylum Cnidaria?
The phylum Cnidaria (pronounced “nih DARE ee uh”) includes soft-bodied stinging animals such as corals, sea anemones, and jellyfish (Fig. 3.23 A). The phylum’s name is derived from the Greek root word cnid- meaning nettle, a stinging plant.
Where was the proto Trans-New Guinea homeland?
The greatest linguistic diversity in Ross’s Trans–New Guinea proposal, and therefore perhaps the location of the proto-Trans–New Guinea homeland, is in the interior highlands of Papua New Guinea, in the central-to-eastern New Guinea cordillera where Wurm first posited his East New Guinea Highlands family.
What are the body plans of cnidarians?
The body plans cnidarians generally have radial symmetry (Fig. 3.25 A). Because the tentacles of corals, jellyfish, and sea anemones have this radial structure, they can sting and capture food coming from any direction. Many cnidarians take two main structural forms during their life cycles, a polyp form and a medusa form.
What are stinging cells called in cnidarians?
Cnidarians have a unique feature: stinging cells called cnidocytes (NID-uh-sites). Each cnidocyte cell has a long, coiled, tubular harpoon-like structure, called a nematocyst (Greek root word nema meaning thread; Greek root word cyst meaning bag ). The unfired nematocyst is inverted into itself, much like a sock bunched up and turned inside out.
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