Question

levels of biological organization ii
which of the following correctly lists the levels of biological organization from most complex to simplest?

multiple choice

○ organism, organ system, organs, tissues, cells
○ cells, tissues, organs, organ systems, organism
○ cells, organs, tissues, organ systems, organism
○ tissues, organs, organ systems, organism, cells
○ organ systems, tissues, cells, organism, organs

Explanation:

To determine the correct order of biological organization from most complex to simplest, we recall the hierarchy: An organism is the most complex, made of organ systems. Organ systems are made of organs, organs of tissues, and tissues of cells (the simplest unit here). Let's analyze each option:

• Option 1: organism (most complex) → organ system → organs → tissues → cells (simplest). This follows the correct top - down (most to least complex) hierarchy.
• Option 2: cells (simplest) → tissues → organs → organ systems → organism (most complex). This is from simplest to most complex, not what we need.
• Option 3: The order cells → organs → tissues is incorrect. Tissues form organs, so tissues should come before organs.
• Option 4: The order tissues → organs → organ systems → organism → cells is incorrect. Cells are the simplest and should be last in a most - to - simplest list, and the progression from tissues to organism then to cells is illogical.
• Option 5: The order organ systems → tissues → cells → organism → organs is a jumbled and incorrect hierarchy.

Answer:

A. organism, organ system, organs, tissues, cells