Chapter 26, Problem 19A

Summary Introduction

Introduction :

Arthropods are grouped into classes based on common characteristics, such as body segment form, appendages and mouthparts. The naming of arthropods is still questioned by taxonomists. Arthropods have joint-appended exoskeletons that allow them to move in diverse ways.

Answer to Problem 19A

Correct answer :

The correct answer is option (B) carry lyme disease bacteria

Explanation of Solution

Explanation/justification for the correct answer :

Options (B) carry lyme disease bacteria. Ticks carry agents that cause disease, such as bacteria, viruses, and protozoa, and transmit them to their hosts at bite. They bear lyme infections include Rocky Mountain spotted fever, and Lyme disease. Mites do not bear bacteria that cause lyme disease. So, the correct answer is option (B).

Explanation for incorrect answer :

Option (A) one oval shaped body. The mites are less than 1 mm long, fusing cephalothorax and abdomen into one oval-shaped portion of the body. So, this is an incorrect answer.

Option (C) less than 1 mm long. Mites are less than 1 mm long, fusing cephalothorax and abdomen into one part of an oval-shaped body. So, this is an incorrect answer.

Option (D) animal parasite. Mites may be predators or other animal's parasites. So, this is an incorrect answer.