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Match the organisms with their descriptions. ______ echinoderms a. stinging cells in tentacles. ______ sponges b. simplest organ systems ______ cnidarians c. no tissues, filters out food ______ flatworms d. jointed exoskeleton ______ roundworms e. mantle over body mass ______ annelids f. segmented worms ______ arthropods g. spiny skinned deuterostomes ______ molluscs h. complete gut, pseudocoelom

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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

Solutions

Chapter
Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 24, Problem 15SQ
Textbook Problem
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Match the organisms with their descriptions.

______ echinoderms a. stinging cells in tentacles.
______ sponges b. simplest organ systems
______ cnidarians c. no tissues, filters out food
______ flatworms d. jointed exoskeleton
______ roundworms e. mantle over body mass
______ annelids f. segmented worms
______ arthropods g. spiny skinned deuterostomes
______ molluscs h. complete gut, pseudocoelom

Summary Introduction

To match: The organisms with their suitable description.

Explanation of Solution

Echinoderms: g. spiny skinned deuterostomes

The Phylum: Echinodermata includes the first deuterostomes animals. The first opening during development develops into anus. The exoskeleton of echinoderms is hard and calcareous with ossicles and spines. Spines are sharp ossicles.

Sponges: c. no tissues, filters out food

The Phylum: Porifera includes the sponges. The sponges lack tissue and organs. The water canal system of the sponges helps to filter the food.

Cnidarians: a. stinging cells in tentacles.

The cnidarians tentacles have stinging cells known as cnidocytes. The cnidocytes help to attack the prey with the specialized organelles called nematocysts.

Flatworms: b. simplest organ system

The flatworms belong to Phylum: Platyhelminthes. The flatworms are the first organisms to have the organ systems. The organ systems of the flatworms are primitive and very simple.

Roundworms: h. complete gut, pseudocoelom

The roundworms belong to Phylum: Aschelminthes. The roundworms have complete alimentary canal and also have complete division of labor between the cells...

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