Domains of Life

1. BACTERIA

1.1. Gram-Positive

1.2. Gram-Negative

1.3. Others

2. ARCHAEA (EXTREMEOPHILES)

2.1. Lovers of Extreme Temperatures

2.2. Lovers of Extreme pHs

2.3. Lovers of Extreme Solute Concentrations (Typically Salts or Sugars)

2.4. Capable of "Extreme" Metabolism (Produce Methane Gas)

3. EUKARYA

3.1. FUNGI

3.1.1. MACROSCOPIC

3.1.1.1. SEVERAL GROUPS

3.1.2. MICROSCOPIC

3.1.2.1. YEASTS

3.1.2.2. MOLDS (HYPHAL)

3.1.2.3. DIMORPHIC

3.2. PROTISTS

3.2.1. MACROSCOPIC

3.2.1.1. ALGAE

3.2.1.2. PROTOZOA

3.2.2. MICROSCOPIC

3.2.2.1. ALGAE

3.2.2.2. PROTOZOA

3.3. PLANTS

3.3.1. MANY GROUPS

3.4. ANIMALS

3.4.1. MACROSCOPIC

3.4.1.1. MANY GROUPS

3.4.2. MICROSCOPIC

3.4.2.1. SOME WORMS

3.4.2.2. SOME ARTHROPODS

3.4.2.3. OTHERS