Biology - Unit 3, Monerans Flashcards
What are archaebacteria?
A group of monerans that live in unusually harsh environments; ancient bacteria
What are eubacteria?
All the organisms traditionally known as bacteria; true bacteria
What are methanogens?
Archaebacteria that produce methane.
What are thermoacidophiles?
Archaebacteria that love in hot acidic waters.
What are chemosynthesizers?
Archaebacteria that use inorganic compounds as an energy source. (deep-sea hot springs formed by volcanic vents on the ocean floor)
What are extreme halophiles?
Archaebacteria that live in extremely salty conditions.
What are gram-positive bacterias?
Bacteria with thick walls made of a protein-sugar complex that takes on the purple colour during gram staining.
What are gram-negative bacteria?
Bacteria that have an extra layer of lipid on the outside of the cell wall and appear pink after gram staining.
What are cyanobacteria?
Gram negative monerans that perform plantlike photosynthesis and release oxygen as a side effect. (autotrophs)
Difference between obligate aerobes, obligate anaerobes and facultative anaerobes.
obligate aerobes: cannot live without oxygen
obligate anaerobes: cannot live with oxygen
facultative anaerobes: can use oxygen, but don’t depend on it.
The characteristics common to all monerans (bacteria)?
- unicellular
- prokaryotic
- heterotrophs or autotrophs
3 shapes of bacteria?
coccus (round), bacillus (rod), spirillium (spiral)
Define binary fission
Bacteria asexual reproduction; chromosome replication/cell division
Define symbiosis
Bacteria living in/on organisms either helping or harming the organism.
Define mutualism
a symbiotic relationship in which both organisms benefit
