METHANOGENS

HALOPHILES

THERMOPHILES

1. They play a role in the nitrogen cycle
2. They play a role in the carbon cycle (some can fix carbon)
3. Some are commensals; they live inside the gut of humans and ruminants, where they help in the digestion of food
4. Certain groups (methanogens) can produce biogas
5. Archaea are used in sewage treatment
6. Certain enzymes from archaea that live at high temperatures or other extreme conditions are used in biotechnology
7. Certain archaea can use metal ions (so they can be used in cleaning up contaminated sites)
Source(s):

ethanogens, Halophiles, and Thermoacidophiles are found in the Archaea kingdom. They once believed to be a form of bacteria, but are no longer classified as bacteria. They live in extreme environments and are stll sometimes classified under archaebacteria. They are thought to be the oldest form of life found on earth.
Halophiles are found in environments with a high salt count. They change their structure in order to survive.
Thermoacidophiles like it acidic and hot.
Methanogens live in anerobic environments such as swamps where muck abounds. They thrive off of conditions that other bacteria would not be able to live in.

LEARNING COMPETENCY: The learner explains the concept of a species and classifies organisms using the hierarchical taxonomic system.

TIME FRAME: I HOUR OR ONE PERIOD
I.OBJECTIVES
At the end of the activities, the students should be able to: 1. Classify bacteria in terms of its shape and arrangements. 2. Identify the structures of the bacterial cell. 3. Recognize the need of personal hygiene.
II. SUBJECT MATTER A. MAIN TOPIC: THE ARCHAEBACTERIA B. SUB TOPIC: THE BACTERIA C. REFERENCES: George Johnson B. , Losos Jonathan B. ,Raven Peter H. ,Singer Susan R. ,BIOLOGY, the seventh edition pp. 545_560 D. Materials : Visual