Magnified image of Archaebacteria
Questions:
1.) Characteristics of different groups of Archaebacteria Kingdom:
Methanogens:
-Found in waters of extreme salinity (15 to 20%)
-Some are important decomposers in marshes and swamps Some are important symbionts in termites & other herbivores
Halophiles:
-Found in mineral springs and thermal volcanic vents on ocean floor
Thermophiles:
-Habitat is hot (60°C to 80°C)
Acidophiles:
-Habitat is acidic (pH 2 to 4)
2.) How common are prokaryotes on earth?
Prokaryotes are very common on earth, in fact... they are nearly everywhere! Most bacteria are prokaryotes (bacteria can live in almost any environment on earth), thus making prokaryotes a very wide range division of organisms.
3.) How do bacterial cell walls differ from plant cell walls?
Bacterial cell walls contain peptidoglycan, which is what makes the cell wall rigid. Peptidoglycan is not very permeable meaning that many small particles cannot pass through it. The bacterial cell wall is designed to protect the bacteria.
4.) How does the cell wall aid in classifying the bacteria?
Batceria have two basic forms of cell walls: gram-positive and gram-negative. Gram positive cells have a thick peptidoglycan layer.
5.) How has molecular systematics (using genome sequences to study organism’s evolutionary relationships) lead to classifying prokaryotes into two domains? In prokaryotes the ancient relationship of organisms comeout to be different and can be categorised into 2 groups so called domains. These domains come from detailed genetic testing and analysis.
6.) Bacteria are important in the chemical cycling that occurs on earth. Describe the role bacteria play in recycling nutrients.
Bateria are decomposers that consume dead vegetation and animals, so it clears up new area for more vegetation.
7.) Humans exploit prokaryotes for scientific and commercial purposes. List and describe 5 of those uses.
-organic fertilizer
-Medicines
-vinegar production
-ethanol production
-curd
1.) Characteristics of different groups of Archaebacteria Kingdom:
Methanogens:
-Found in waters of extreme salinity (15 to 20%)
-Some are important decomposers in marshes and swamps Some are important symbionts in termites & other herbivores
Halophiles:
-Found in mineral springs and thermal volcanic vents on ocean floor
Thermophiles:
-Habitat is hot (60°C to 80°C)
Acidophiles:
-Habitat is acidic (pH 2 to 4)
2.) How common are prokaryotes on earth?
Prokaryotes are very common on earth, in fact... they are nearly everywhere! Most bacteria are prokaryotes (bacteria can live in almost any environment on earth), thus making prokaryotes a very wide range division of organisms.
3.) How do bacterial cell walls differ from plant cell walls?
Bacterial cell walls contain peptidoglycan, which is what makes the cell wall rigid. Peptidoglycan is not very permeable meaning that many small particles cannot pass through it. The bacterial cell wall is designed to protect the bacteria.
4.) How does the cell wall aid in classifying the bacteria?
Batceria have two basic forms of cell walls: gram-positive and gram-negative. Gram positive cells have a thick peptidoglycan layer.
5.) How has molecular systematics (using genome sequences to study organism’s evolutionary relationships) lead to classifying prokaryotes into two domains? In prokaryotes the ancient relationship of organisms comeout to be different and can be categorised into 2 groups so called domains. These domains come from detailed genetic testing and analysis.
6.) Bacteria are important in the chemical cycling that occurs on earth. Describe the role bacteria play in recycling nutrients.
Bateria are decomposers that consume dead vegetation and animals, so it clears up new area for more vegetation.
7.) Humans exploit prokaryotes for scientific and commercial purposes. List and describe 5 of those uses.
-organic fertilizer
-Medicines
-vinegar production
-ethanol production
-curd