Questions
-
T Found in mineral springs and thermal volcanic vents on ocean floor
H Found in waters of extreme salinity (15 to 20%)
M Some are important symbionts in termites & other herbivores
M Some are important decomposers in marshes and swamps
T Habitat is hot (60°C to 80°C)
A Habitat is acidic (pH 2 to 4) - How
common are prokaryotes on earth?
They are extremely common. - How
do bacterial cell walls differ from plant cell walls?
Bacteria cell walls have peptidoglycan which makes rigid cell walls that protect the cell from being invaded while plant cells have more gel-like walls.
- How
does the cell wall aid in classifying the bacteria?
The cell wall can be tested to be seen if it is gram positive or gram negative to determine the type of bacteria.
- How
has molecular systematics (using genome sequences to study organism’s
evolutionary relationships) lead to classifying prokaryotes into two domains?
Before molecular systematics, bacteria and archaea were both classified as prokaryotes. However, using genome sequences, it has been found that archaea genes are more like those of eukaryotes than bacteria.
- Bacteria
are important in the chemical cycling that occurs on earth. Describe the role
bacteria play in recycling nutrients.
Bacteria help in the recycling of nutrients by decomposing waste and converting atmospheric nitrogen into those usable by plants. They also help to perform photosynthesis in aquatic environments.
- Humans
exploit prokaryotes for scientific and commercial purposes. List and describe 5
of those uses.
WORKS CITED
Levine, Joseph S. and Kenneth R. Miller. Biology. Upper Saddle River. 2010. Print.
Plant Cells, Chloroplasts, and Cell Walls. Scitable by Nature Education, Web. 04 April 2014.
"The Six Kingdoms of Life." PAEC. Biology Partnership., Web. 7 April 2014. <http://www.paec.org/biologypartnership/assets/classification/6%20Kingdoms.pdf>