To summarize:
Three general environments where archaea live and to give one example of each environment
Introduction:
There are six kingdoms of organisms; archaebacteria, eubacteria, protists,
Answer to Problem 4MI
- Hot, acidic environment such as sulfur hot springs, thermal vents, volcanoes- thermoacidophiles
- High salt concentration such as in Great Salt Lake, Dead Sea- halophiles
- Oxygen free conditions such as swamps, bogs, volcanic vents
Explanation of Solution
Most archaebacteria live in extreme conditions such as swamps, deep- ocean hydrothermal vents, and seawater evaporating ponds. Most of these environments are oxygen free.
Three kinds of environments which archaebacteria predominate are:
- Hot, acidic conditions such as sulfur hot springs, thermal vents on ocean floor and around volcanoes- Example is thermoacidophiles. They can live in temperatures above 800C and a pH of 1- 2. Some of these bacteria cannot live below 550C. Many are even strictly anaerobic; that is they die in the presence of oxygen.
- High salt concentration such as Great Salt Lake, Dead Sea- Example is halophiles. Some archaebacteria live in very salty conditions. They are adapted to survive in high salt concentrations. They are mostly aerobic and some carry out unique form of photosynthesis using a protein instead of chlorophyll.
- Oxygen free environment such as swamps, bogs, volcanic vents- example is methanogens. These are obligate anaerobes, which mean they cannot live in presence of oxygen. They use carbon dioxide during respiration and produce methane as a waste product. Methanogens are found in sewage treatment plants, bogs, swamps etc. they can even live in gastrointestinal tract of humans and other animals and are responsible for release of gases from lower digestive tract.
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