Notes on cnidaria

The basic cycle is egg, planula larva, polyp, medusa, with the medusa being the sexual stage.

Notes on cnidaria

Student Answers krishna-agrawala Student Animals with a backbone spinal columns and a cranium base are classified as vertebrates. Animals that lack such a column are called invertebrates.

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There are more than 1 million known species kinds of invertebrates and about 40, species of vertebrates. Most vertebrates have a spinal column made of bones called vertebrae.

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But some, such as the shark, do not have a bony spinal column. Sharks have vertebrae made of cartilage.

IB Biology Notes - Classification

All vertebrates are bilaterally symmetrical - that is, the left and right sides of the body are alike. The body is usually divided into a head and a trunk. The more advanced land vertebrates have a neck. In mammals, the trunk is divided into a thorax chest and abdomen.

Vertebrates never have more than two pairs of limbs.

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Vertebrates are classified in the phylum chordata and make up the subphylum vertebrata. They may be further divided into eight classes: As invertebrates include a very large number of animals which have been classified by scientissts in several major groups called phyla including porifera, cnidaria, cnidarians, platyhelminthes, nematoda, annelida, echinodermata, mollusca, and arthropoda.

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The project is made possible by our Sponsors and by PANNA general funds. We need your support to maintain and improve this . Lion's Mane Jellyfish Cyanea capillata Photograph by Wayne Curtis (Sunderland) British distribution: Common off the west coast of Scotland and in the northern North Sea.

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As Washington notes further in his autobiography, “The part of the country possessing this thick, dark, and naturally rich soil was, of course, the part of the South where the slaves were most profitable, and consequently they were taken there in the largest numbers.

IB Biology notes on Classification. Classification Outline the binomial system of nomenclature. Species are a group of organisms with similar characteristics which can interbreed and produce fertile offspring whereas a genus is a group of similar species.

Get an answer for ' What's an animal with a backbone called; what's an animal without a backbone called? Please give examples of each. ' and find homework help for other Science questions at eNotes.

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Notes on cnidaria

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