Chapter 1, Problem 1RQ

The correct sequence of levels forming the structural hierarchy is

A. (a) organ, organ system, cellular, chemical, tissue, organismal;

B. (b) chemical, cellular, tissue, organismal, organ, organ system;

C. (c) chemical, cellular, tissue, organ, organ system, organismal;

D. (d) organismal, organ system, organ, tissue, cellular, chemical.

Summary Introduction

To determine:

The correct sequence of levels forming structural hierarchy is

1. organ, organ system, cellular, chemical, tissue, organismal

2. chemical, cellular, tissue, organismal, organ, organ system

3. chemical, cellular, tissue, organ, organ system, organismal

4. organismal, organ system, organ, tissue, cellular, chemical

Answer to Problem 1RQ

Solution:

(c) Chemical, cellular, tissue, organ, organ system, organismal: In a human body, there are six main levels of structural organization.

Explanation of Solution

The structural organization begins at the simplest level, that is, the chemical level. This level includes the simplest building blocks composed of matter such as atoms and molecules. This level is followed by the cellular level, which is made up of the cell. The cell is considered as the smallest, as well as the functional, unit of living organisms that can exist on its own. The cellular level is followed by the tissue, organ, organ system, and organismal level.