Question

which sequence accurately reflects the hierarchy of organization from the simplest to the most complex?

• systems → cells → tissues → organs
• cells → organs → tissues → systems
• cells → tissues → organs → systems
• systems → organs → tissues → cells

Explanation:

In biological organization, the simplest unit is the cell. Groups of specialized cells form tissues, tissues combine to make organs, and multiple organs work together as organ systems, which is the most complex level listed.

Answer:

cells → tissues → organs → systems