Principles of Biology
Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 23.2, Problem 2TYK
Summary Introduction

Introduction:

Archaea bacteria produce methane as metabolic by product under anaerobic conditions. Methanogens belongs to the domain of archaea, which are distinctly different then bacteria. Methanogens are usually coccoid or bacilli.

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“Microbial life is incredibly diverse and microorganisms play an essential role in the entire biosphere.”
Methanopyrus kandleri and Pyrolobus fumarij are bacteria that live near hydrothermal vents under the oceans. Temperatures at these vents can reach well over 100 degrees Celsius.   Both organisms obtain energy from hydrogen but Methanopyrus kandleri grows best at 98 degrees Celsius while Pyrolobus fumarij prefers to reproduce at temperatures above 100 degrees Celsius. These bacteria provide the base of a food web at the bottom of the ocean floor.   What questions could a student ask in order to investigate this difference between the bacteria?   A. What kind of heat tolerance do other nearby organisms have?   B. Does the Methanopyrus kandleri live farther away from the vent than the Pyrolobus fumarij?   C. Does Methanopyrus kandleri have a thicker cell wall than Pyrolobus fumarij?   D. Is one organism better adapted to the environment than the other?
The production of by prokaryotes increased its atmospheric concentration and enabled more complex forms of life to evolve. (a) carbon dioxide (b) oxygen (c) nitrogen (d) all of the above
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