HB Final Topic Sheet: Intro to Biology-Hierarchy of Life

Atom

First level of the hierarchy of life. An example of this would be lithium.

Molecule

Second level of the hierarchy of life. An example of this would water.

Organelle

Third level of the hierarchy of life. An example of this would be DNA

Cell

Fourth level of the hierarchy of life. An example of this would be euglena.

Tissue

Fifth level of the hierarchy of life. An example of this would be cuboidal epithelium.

Organ

Sixth level of the hierarchy of life. An example of this would be brain.

Organ System

Seventh level of the hierarchy of life. An example of this would be the respiratory system.

Organism

Eighth level of the hierarchy of life. An example of this would be a cat.

Population

Ninth level of the hierarchy of life. An example of this would be a lion pride.

Community

Tenth level of the hierarchy of life. An example of this would be lions and zebras.

Ecosystem

Eleventh level of the hierarchy of life. An example of this would be lions, zebras, trees, grass, soil, etc.

Biosphere

Twelfth level of the hierarchy of life. An example of this would be life on Earth.