Test 3 Early Life & Microbial Ecology Flashcards
What are coliforms?
A bacterial group used as an indicator of water contamination in the United States.
Soil is added to a compost pile to…
Introduce environmental microorganisms used for degradation.
Extremly halophilic archaea
A group of Archaea that are generally mesophilic, primarily chemoorganoheterotrophs. and usually require NaCl levels above 1.5M
RNA was likely pivotal in life’s beginnings because…
It can duplicate on its own and it can act as an enzyme.
What are methanotrophs?
Organsims that can metabolize methane as their source of energy and carbon.
What are pseudomurein?
The substance found in the cell walls of Archaea.
True or false: Methanogenic bacteria are commonly found ina cow rumen that is full of grass.
True
What are the four steps in the typical water treatment process
- Settling of sediments
- Alum addition
- Sand filtration
- Chlorine addition
True or false: Methanogenic Archaea are strict aerobes?
False. They are strict anaerobes
How is water typically tested for GI organisms?
It is tested for common GI pathogens found in feces.
Carl Woese and his colleagues determined that all living organisms belong to one of three domains based on evidence from \_\_\_\_\_\_\_\_ sequences
Ribosomal RNA (rRNA)
What are exteme thermophiles
Organisms that grow optimally at extremly high temperatures.
What is microbial ecology?
The study of the community dynamics among microbes and the other organsims in the environements in which they live.
What are biogeochemical cycles?
Nutrient cycling involving biological and chemical processes and often redox reactions that change nutrients’ chemical and physical properties. Five biogeochemical cycles include the carbon, nitrogen, sulfur, oxyegn and phosphorous cycles.
What is bioremediation?
The use of biological agents to degrade or remove pollutants in an environment.
