1. ARCHAEA

2. OUTLINE Definition of Archaea Structure of Archaea History of Archaea
Environments and Habitats of Archaea
Archaea and Bacteria Comparison
References

3. OUTLINE Definition of Archaea Structure of Archaea History of Archaea
Environments and Habitats of Archaea
Archaea and Bacteria Comparison
References

4. Definition of Archaea
Archaea are organisms consisting of a single cell without a nucleus and with distinct structural. They inhabit a wide range of habitats, including extreme environments. Archaea form one of the three domains of life; the others are bacteria and eukaryotes.

5. OUTLINE Structure of Archaea Definition of Archaea History of Archaea
Environments and Habitats of Archaea
Archaea and Bacteria Comparison
References

6. Structure of Archaea
Like bacteria, Archaea have no internal membranes and their DNA exists as a single loop called a plasmid and lack a defined nucleus. Archaea may have one or more flagella attached to them, and an outer cell membrane. Archaea can be spherical, rod, spiral, lobed, rectangular or irregular in shape. An unusual flat.

7. Structure of Archaea

8. Structure of Archaea

9. OUTLINE History of Archaea Definition of Archaea Structure of Archaea
Environments and Habitats of Archaea
Archaea and Bacteria Comparison
References

10. History of Archaea
The scientific community was understandably shocked in the late 1970s by the discovery of an entirely new group of organisms, the Archaea. However, biochemically and genetically, they are as different from bacteria as humans are.

11. History of Archaea
Because of this vast difference in genetic makeup, Dr. Carl Woese proposed that life be divided into three domains:
Eukaryota
Eubacteria
Archaebacteria.
He later decided that the term Archaebacteria was a misnomer, and shortened it to Archaea.

12. History of Archaea

13. OUTLINE Definition of Archaea Structure of Archaea History of Archaea
Environments and Habitats of Archaea
Archaea and Bacteria Comparison
References

14. Environments and Habitats of Archaea
Archaeans may be the only organisms that can live in extreme habitats. However, Archaeans are not restricted to extreme environments; new research is showing that Archaeans are also quite abundant in the plankton of the open sea.

15. Environments and Habitats of Archaea
Archaeans include inhabitants of some of the most extreme environments on the planet:
In the deep sea at temperatures well over 100 degrees Centigrade.
Hot springs.
Extremely alkaline or acid waters.
Anoxic mud's of marshes.
The bottom of the ocean.

16. Environments and Habitats of Archaea

17. OUTLINE Definition of Archaea Structure of Archaea History of Archaea
Environments and Habitats of Archaea
Archaea and Bacteria Comparison
References

18. Archaea and Bacteria Comparison
Present
Ribosomes
Peptidoglycan / Lip polysaccharide
Pseudopeptidoglycan
Cell wall
found in soil, hot springs, radioactive waste water, Earth's crust, organic matter.
extreme and harsh environments like hot springs, salt lakes.
Habitat
Eubacteria reproduce asexually through binary fission, budding, fragmentation.
Archaea reproduce asexually by the process of binary fission, budding and fragmentation.
Growth & Reproduction

19. Archaea and Bacteria Comparison
Size and shape :
Both Archaea and Eubacteria found occurring as rods, cocci, spirals, plates, or coiled.

20. OUTLINE References Definition of Archaea Structure of Archaea
History of Archaea
Environments and Habitats of Archaea
Archaea and Bacteria Comparison
References

21. References