Microbial Interactions
Biology ⇒ Microorganisms and Microbiology
Microbial Interactions starts at 10 and continues till grade 12.
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Describe how commensalism differs from amensalism in microbial interactions.
Describe one way in which microbial interactions can be beneficial to agriculture.
Describe the difference between parasitism and mutualism in microbial interactions.
Describe the importance of microbial interactions in wastewater treatment.
Which type of microbial interaction is represented by the following scenario? 'A bacterium lives on the skin of a human, gaining nutrients, but the human is unaffected.'
(1) Mutualism
(2) Parasitism
(3) Commensalism
(4) Competition
A researcher finds that in a mixed microbial culture, the removal of one species leads to the collapse of the entire community. What does this suggest about the type of interactions present, and why might this occur?
A scientist observes that two bacterial species, A and B, are grown together in a nutrient-limited environment. Over time, species A produces a chemical that inhibits the growth of species B, but species A is not affected. What type of microbial interaction is this, and explain the ecological advantage for species A?
Which of the following scenarios best illustrates syntrophy in microbial interactions?
(1) Two bacteria compete for the same sugar source
(2) One bacterium produces hydrogen as a waste product, which is then used by another bacterium for energy
(3) A virus infects and kills a bacterial cell
(4) A fungus produces antibiotics that inhibit bacterial growth
Which of the following best describes amensalism?
(1) Both organisms benefit
(2) One organism is harmed, the other is unaffected
(3) Both organisms are harmed
(4) One organism benefits, the other is unaffected
Which of the following best describes mutualism in microbial interactions?
(1) Both organisms benefit
(2) One organism benefits, the other is harmed
(3) One organism benefits, the other is unaffected
(4) Both organisms are harmed
Which of the following interactions involves one organism benefiting and the other being harmed?
(1) Mutualism
(2) Parasitism
(3) Commensalism
(4) Synergism
Which of the following is an example of amensalism?
(1) Penicillium fungus secreting penicillin that kills bacteria
(2) Bacteria in the gut producing vitamins
(3) Algae and fungi forming lichens
(4) Bacteria competing for nutrients
Fill in the blank: In __________, two or more microorganisms work together to achieve a result that neither could accomplish alone.
Fill in the blank: The interaction between a virus and its bacterial host is an example of __________.
Fill in the blank: The interaction where both microorganisms are harmed is called __________.
Fill in the blank: The interaction where one microorganism benefits and the other is harmed is called __________.
True or False: All microbial interactions are visible to the naked eye.
True or False: Competition between microorganisms always results in the death of one species.
True or False: In commensalism, one microorganism benefits while the other is neither helped nor harmed.
True or False: In mutualism, both microorganisms are always of the same species.
