STUDENT INSTRUCTION AND ANSWER SHEET
Activity 3: Extreme Life Styles - What Are the Limits?
Read the following on-line written materials about life in extreme environments.
Be sure to examine the link labeled Punishing Environments at the beginning of the article and the link labeled Images of Extremophiles at the end of the article."Extremophiles" from the Virtual Museum of Bacteria:
This article provides a great deal of background information into the names and life styles of many extremophiles found on Earth.
"Chapter #17: Microbial
Diversity in Archaea" from Brock -Biology of Microorganisms by Madigan,
Martiko and Parker:
"Inroduction to the Archaea"
from UC Berkeley's Museum of Paleontology:
A. What are the three primary branches of the tree of life?
D. At how high of a temperature does life become too extreme for eukarya?
E. What is the name of the organism thought to live at the greatest temperature? At what temperature does it live? Where does it live?
G. List the different species that scientists have found living in the extremely cold Antarctic sea-ice.
H. How do organisms live without freezing in extremely cold environments?
L. Do acidophiles have high acidity in their cells? Explain why or why not.
M. Create a list of the most
extreme conditions that life has been found to exist in here on Earth.
Include information about extreme temperatures, pH, elevation limits,
light levels, radiation exposure, size, and oxygen availability. If possible
try to list an example organism that lives at each extreme.
N. What is unique about the cell walls of archaea?