Biology: Concepts and Investigations
Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
Question
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Chapter 29, Problem 1MCQ
Summary Introduction

Introduction :

The majority of animals have an exoskeleton, a tough exterior covering that shields them from the elements. The animal is supported by the endoskeleton, which is located inside the body. The majority of the exoskeleton is composed of bone and cartilage. The exoskeleton is made up of shells made of chitin, cuticles, and scales.

Expert Solution & Answer
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Answer to Problem 1MCQ

Correct answer :

The correct answer is option (a) their ability to protect an animal from the outside.

Explanation of Solution

Explanation/justification for the correct answer :

Option (a) their ability to protect an animal from the outside. The organism's exoskeleton is its outside, hard shell. The animal is therefore shielded from the environment by its exoskeleton. On the other hand, the endoskeleton supports the body from within. So, the correct answer is option (a).

Explanation for incorrect answer :

Option (b) their ability to grow along with an organism. Exoskeleton-equipped animals molt or lose their outer skeletons as they grow in order to produce new ones. This aids the animal's ability to enlarge and change in form while preserving its exoskeleton. Given that an endoskeleton exists inside the body, it expands as the body does as it becomes larger and more voluminous. Because of this, the exoskeleton does not develop with the organism, but the endoskeleton does. So, this is an incorrect option.

Option (c) their function as a framework for muscle attachment. Both the exoskeleton and the endoskeleton offer surfaces on which the organism's numerous muscles can be attached. Therefore, the exoskeleton and endoskeleton are identical in this regard. So, this is an incorrect answer.

Option (d) Both a and b are correct. The solution given in option (b) above is incorrect. As a result, the responses listed in option (d) cannot be combined.

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Students have asked these similar questions
How do bones enable muscles to move a body part?   A. They support the entire length of muscles.   B. They protect the muscles from the environment.   C. They provide new cells for muscles when needed.   D. They serve as places to anchor or attach muscles.   E. All of the above answer choices correctly answer the question.
Which of the following statements is true of the chameleon tongue but not of the human tongue? A. It is a muscular hydrostat. B. Force generation reflects the binding of myosin crossbridges to actin thin filaments. C. The organization of the actin and myosin filaments produces a regular pattern of bands, or striations. D. Gaps or holes in the Z-discs allow supercontraction (shortening beyond the normal limit). E. All of the above statements are true of both the chameleon tongue and the human tongue.
Which of the following thin filament structures directly interacts with the myosin heads to form a cross bridge? a. Myosin b. Troponin  c. Tropomyosin d. F actin e. G actin
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