Autotrophs vs. Heterotrophs: Energy & Carbon Sources

Autotrophs and Heterotrophs Defined

F.5.1 Define the terms photoautotroph, photoheterotroph, chemoautotroph, and chemoheterotroph

Photoautotroph: An organism that uses light energy to generate ATP and produce organic compounds from inorganic substances.

Photoheterotroph: An organism that uses light energy to generate ATP and obtains organic compounds from other organisms.

Chemoautotroph: An organism that uses energy from chemical reactions to generate ATP and produce organic compounds from inorganic substances.

Chemoheterotroph: An organism that uses energy from chemical reactions to generate ATP and obtains organic compounds from other organisms.

Examples of Autotrophs and Heterotrophs

F.5.2 State one example of a photoautotroph, photoheterotroph, chemoautotroph, and chemoheterotroph

Photoautotroph: Cyanobacteria

Photoheterotroph: Rhodospirillum

Chemoautotroph: Nitrobacter

Chemoheterotroph: Lactobacillus

Comparing Photoautotrophs and Photoheterotrophs

F.5.3 Compare photoautotrophs with photoheterotrophs in terms of energy sources and carbon sources

Comparing Chemoautotrophs and Chemoheterotrophs

F.5.4 Compare chemoautotrophs with chemoheterotrophs in terms of energy source and carbon source

The Role of Bacteria in Bioremediation

F.5.5 Explain the use of bacteria in the bioremediation of soil and water

Bioremediation is the process by which microorganisms are used to return an environment altered by contaminants to its natural state.

• The enzymes produced by specific bacteria may be able to break down contaminating material so that it can be filtered out of the environment.
• Examples of bioremediation include:

Intracellular vs. Extracellular Bacterial Infections

F.6.2 Distinguish between intracellular and extracellular bacterial infection using Chlamydia and Streptococcus as examples