This document discusses the classification of organisms and archaebacteria. It explains that scientists classify organisms into a hierarchy of taxonomic ranks from the broadest domain or kingdom down to species to study and share information about them. Archaebacteria are classified in the domain Archaea and kingdom Archaebacteria. They are microscopic organisms that can survive in extreme environments like places without oxygen, high salt concentrations, and high temperatures. Examples of archaebacterial groups mentioned are methanogens, halophiles, and thermophiles.

1. SCIENCE 8
BIODIVERSITY

2. CLASSIFYING AND NAMING ORGANISMS
For organisms to be studied and
information about them shared to those
who need it, scientists grouped them
into meaningful classifications. The
different groups are ranked from the
largest to the smallest groups.

3. Sample Classification of organisms
Category Domesticated Cat Dog Bangus Wolf Lion
Kingdom Animalia Animalia Animalia Animalia Animalia
Phylum Chordata Chordata Chordata Chordata Chordata
Class Mammalia Mammalia Actinopterygii Mammalia Mammalia
Order Carnivora Carnivora Gonorynchiformis Carnivora Carnivora
Family Felidae Canidae Chanidae Canidae Felidae
Genus Felis Canis Chanos Canis Panthera
Species Catus Familiaris Chanos Lupus Leo

4. Archaea Domain: Kingdom
Archaebacteria
Organisms that belong to this kingdom
are all microscopic. They live in various
places, some even in the most severe
environments. Methanogens, Halophiles
and Thermophiles are examples of
archaebacterial.

5. Do you know?
 Methanogens can survive in
places where there is no
oxygen. Some members of
this group inhabit digestive
tracts of animals and ponds
where animal, human, and
domestic wastes are treated.
(Source: Philippines. Department of Education. (2009).
Science and Technology II. Textbook (Rev. ed.). Pasig
City: Instructional Materials Development Corporation.
p.243.)

6. “
”
An important characteristic of
this group is they produce
methane gas.
Methane is utilized as biogas, a cheap
alternative source of energy.

7. “
”
If you live in areas which make salt, have
you observed the orange or yellow color
in salt ponds? This is due to the
presence of Halophiles.
Halophiles are organisms that thrive in high salt concentrations.The
name comes from the Greek word for "salt-loving".

8. On the right are examples of
Thermophiles. This group of
archaebacterial can live in places
with high temperature. These
areas include volcanic hot
springs with temperatures from
80 to 110 degrees celcius.
Thermophiles turn hydrogen
sulfide (H2S) released from the
openings to food for other
organisms and in turn are
provided essential nutrients by
the former.
(Source: Philippines. Department of Education. (2009). Science and
Technology II. Textbook (Rev. ed.). Pasig City: Instructional Materials
Development Corporation. p.242).