
Concept explainers
Introduction:
Skeleton is a hard structure that protects the internal organs of a living organism. A system, composing bones, muscles, and other tissues that help in the movement and locomotion in an individual, is called a skeletal system.

Answer to Problem 1MCQ
Correct answer:
Exoskeleton and endoskeleton differ from each other in protecting the animal body from outside as well as its ability to grow with an organism. Hence, the correct answer is option d.
Explanation of Solution
Reason for correct answer:
Option d. is given as “both a and b are correct.”
Skeleton system is the culmination of joints and bones present in the body of an individual. The skeleton system secures the internal body organs of different organisms. For example, the skull is part of the skeletal system that helps in the protection of the brain. The exoskeleton protects the individual from different kinds of environmental stress and develops with the growth of the organism.
Reason for incorrect answer:
Option a. is given as, “their ability to protect an animal from the outside.”
The exoskeleton also shows the ability to grow with the organism. Hence, option a. is incorrect.
Option b. is given as, “their ability to grow along with organism.”
The exoskeleton protects the internal organs of the body as well. Hence, option b. is incorrect.
Option c. is given as, “their function as a framework for muscle attachment.”
The concept of muscle attachment is related to the endoskeleton system. Hence, option c. is incorrect.
Hence, the options a., b., and c. are incorrect.
Exoskeleton and endoskeleton differ from each other in protecting the animal body from the outside environment as well as its ability to grow along with an organism. Thus, the correct answer is option d.
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Chapter 26 Solutions
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