Chapter 26, Problem 11STP

Summary Introduction

To analyze:

The characteristics that distinguish arthropods from other invertebrates.

Introduction :

The arthropods are divided into groups according to the body segment, mouthparts, and appendages of their body. The groups include crustaceans, spiders and their relatives, and insect and their relatives. The crustaceans have two pairs of antennae, mandibles, two compound eyes, five pairs of legs, and they are swimmers. The spiders and their relatives do not have antennae, six pairs of legs, and two body sections. The insects and their relatives have antennae, three pairs of legs, and three body areas.

Explanation of Solution

The organisms of the phylum arthropods have many invertebrates like spider, millipedes, insects, etc. and tough exoskeletons, segmented body with jointed legs. The exoskeleton is the outer covering found in insects that protect the outer surface of the organism and maintain the muscle attached with it. But in other invertebrates they do not have exoskeleton and joint appendages and these characteristics make the arthropods different from other invertebrates.

Conclusion

The invertebrates of phylum arthropods have hard exoskeleton and joint legs these characteristics distinguish them from other invertebrates.