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CAMP.BIO:CONC...MOD.MAST+PRINT>I<
10th Edition
ISBN: 9780136858287
Author: Taylor
Publisher: INTER PEAR
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Chapter 18, Problem 1CC
Summary Introduction

To enlist:

The characteristics and representatives of the given animal phyla.

Introduction:

Animal phyla include a list of the major groups of animals that include invertebrates and vertebrates. Invertebrates are the animals that do not have a backbone and the vertebrates are the backbone bearing animals.

Expert Solution & Answer
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Explanation of Solution

The key characteristics and the representatives of the animal phyla are described in the following table.

Phylum

Characteristics

Representatives

Sponges

They are included in phylum porifera. It is a simple animal with no mouth, heart or muscles. It is sessile animal containing many pores and cells for filter feeding. Asymmetrical.

Sponges and common bath sponge.

Cnidarians

They are aquatic animals. Coelom is absent. They contain cnidocyte cells to capture prey. Radial symmetry.

Sea anemone, jellyfish, corals and Obelia.

Flatworms

Included in phylum Platyhelminthes. No body cavity. Bilateral symmetry.

Planaria and tape worms.

Nematodes

They have complete digestive systems, are free living and parasitic both. Bilateral symmetry.

Roundworms and hookworms.

Molluscs

They have a soft and unsegmented body. Have mantle and the muscular foot.

Snails, squids, octopus and mussels.

Annelida

They are the true segmented worms. Have closed circulatory system.

Earthworms and leeches.

Arthropods

Presence of jointed legs, antennae, exoskeleton and closed circulatory system. Bilateral symmetry.

Insects, crab and millipedes.

Echinoderms

They have spiny skin, water vascular system, body containing 5 equal segments and tube feet. Radial symmetry.

Star fish and sea urchin.

Chordates

Presence of notochord, dorsal nerve chord, gill slits and bilateral symmetry.

Mammals, fish, birds, reptiles and amphibians.

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