Concept explainers
Which of the following represents the correct order of organization of an animal’s body?
- a. Cells; organs; organ systems; tissues
- b. Cells; tissues; organ systems; organs
- c. Tissues; cells; organs; organ systems
- d. Cells; tissues: organs; organ systems
Introduction:
The biologists describe the animal body in terms of an organizational hierarchy. A cell is the basic structural and functional unit of life. Most animals comprised of tissues. Tissues are the groups of specialized cells that interact and provide a specific function. The two or more interacting tissues form an organ that function as a unit and if two or more organs are physically or functionally joined then it leads to the formation of organ system.
Answer to Problem 1MCQ
Correct answer:
The correct order of organization of an animal’s body is cells; tissues; organs; organs system. Therefore, option (d) is correct.
Explanation of Solution
Reason for the correct statement:
In the organization of human body, the group of cells forms tissues, two or more tissues form organ, and grouping of organs ultimately form the organ system.
Option (d) is given as “cells; tissues; organs; organ systems”
As “the correct order of an animal’s body organization is cells; tissues; organs; organ systems” is the right answer.
Hence, option (d) is correct.
Reason for the incorrect statements:
Option (a), is given as “cells; organs; organ systems; tissues”.
It is not the correct order of organization of an animal’s body as the group of cells form tissues not the organs. Hence, it is a wrong answer.
Option (b), is given as “cells; tissues; organs systems; organs”.
It is also not the correct order of organization of an animal’s body as the group of two or more tissues forms an organ not the organ system. Hence, it is a wrong answer.
Option (c), is given as “tissues; cells; organs; organ systems”.
It is not the order of animal body organizational hierarchy as the group of cells form tissue not the tissues from cells. Hence, it is a wrong answer.
Hence, options (a), (b), and (c) are incorrect.
Therefore, the correct order of organization of an animal’s body is cells; tissues; organs; organ systems.
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