Which two of these are in the wrong order (from smallest to largest)?

1. Organism - A single being in a population.
2. Organ system - All the systems in the organism.
3. Tissue - Parts of an Organ with specific jobs.
4. Organ - Parts of the organ system that work together.
5. Organelle - parts inside the cell the help the cell function.
6. Cell - tiny microorganisms that make up tissues.
7. Molecule - A cluster of atoms held together by chemical bonds.

a
none
b
5 & 3
c
5 & 4
d
2 & 3

1 answer

To determine which two items are in the wrong order from smallest to largest, we need to consider the biological hierarchy represented by these definitions:

  1. Molecule - A cluster of atoms held together by chemical bonds.
  2. Organelle - Parts inside the cell that help the cell function.
  3. Cell - Tiny microorganisms that make up tissues.
  4. Tissue - Parts of an organ with specific jobs.
  5. Organ - Parts of the organ system that work together.
  6. Organ System - All the systems in the organism.
  7. Organism - A single being in a population.

The correct order, from smallest to largest, should be:

  • Molecule
  • Organelle
  • Cell
  • Tissue
  • Organ
  • Organ System
  • Organism

Now, let's look at the options:

  • 5 (Organelle) should come before 3 (Tissue) since organelles are found in cells, which make up tissues.
  • 4 (Organ) should be after 3 (Tissue), and the same applies to 2 (Organ System) which is larger than 4 (Organ).

The two items that are out of order are:

  • 5 (Organelle) is indeed in the correct position as smaller than 3 (Tissue).
  • However, 2 (Organ System) and 3 (Tissue) are also in the wrong order since the Organ System should come after Organs and Tissues.

The answer is d (2 & 3), where 2 (Organ System) is larger than 3 (Tissue) and they are misplaced relative to the hierarchy. Thus, d is correct since Organ System should come after Organ, not in between Tissue and Organ.