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Match each structure with its descriptions. _____ radula a. internal skeleton _____ exoskeleton b. external skeleton _____ endoskeleton c. stinging cell of cnidarians _____ cnidocyte d. excretory organ of insects _____ compound eye e. mollusk feeding device _____ tube foot f. larva of annelid or mollusk _____ trochophore g. has many lenses _____ Malpighian tubule h. moves an echinoderm _____ gastrovascular cavity i. digests a planarian’s food

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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 14SQ
Textbook Problem
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Match each structure with its descriptions.

_____ radula a. internal skeleton
_____ exoskeleton b. external skeleton
_____ endoskeleton c. stinging cell of cnidarians
_____ cnidocyte d. excretory organ of insects
_____ compound eye e. mollusk feeding device
_____ tube foot f. larva of annelid or mollusk
_____ trochophore g. has many lenses
_____ Malpighian tubule h. moves an echinoderm
_____ gastrovascular cavity i. digests a planarian’s food

Summary Introduction

To match: Each structure with their suitable description.

Explanation of Solution

Radula: e. mollusk feeding device

The mollusks are soft-bodies animals that lack proper mouth parts. The radula scrapes the food consumed and helps to digest them.

Exoskeleton:b. external skeleton

The exoskeleton is the outermost hard port of the body of some invertebrates. The exoskeleton is often attached to muscles and helps in locomotion with the limbs or feathers.

Endoskeleton: a. internal skeleton

The endoskeleton is exclusive to the echinoderm invertebrates. The skin or epidermis of the echinoderms is deposited with bits of calcium carbonate that hardens it and forms the endoskeleton.

Cnidocyte: c. stinging cell of cnidarians

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

Compound eye: g. has many lenses

There are two types of eyes: simple eyes and compound eyes based on the number of lenses. The compound eyes have several lenses and are present in arthropods like crustaceans and insects. The individual units of compound eyes are known as ommatidia. Each ommatidium has cornea, lens and photoreceptor cells for the sense of vision.

Tube foot: h. moves an echinoderm

Tube feet are the locomotory organs present on the limbs of echinoderms like the sea star...

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