Tag Archive | "gause"

Does Yeast Outcompete Bacteria In A Petri Dish?


I apologize for this being so long.
So I’m doing this independent research for AP Biology and it involves growing, identifying, and testing sensitivity to antibiotics for bacteria. Yes it was originally 3 parts, and I finished them all and was about to write the report and get the presentation ready, when I noticed that a fungus was growing on one of the dishes and no bacterial colony growth was visible near it. I did some tests and some observation and based on the results and appearance I concluded that it was Absidia corymbifera or Mycocladus corymbifera as they sometimes call it. Now this got me thinking about Gause’s Competitive Exclusion Principle and I thought maybe I should add a 4th part to my experiment studying the competition between these two organisms given they can only occupy the same niche ie: use the same agar.
My question is, does yeast out-compete bacteria in Lysogenic broth (regular agar) or vice-versa?
I would believe that being eukaryotes and requiring less nutrients (most yeast can grow on sugar water) the yeast would out-compete the bacteria but are there any studies supporting my idea?

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Is Gause’s Principle Right?


I am doing my biology lab. my lab is about Ecological Niche. bacteria is our model organism. we set temperature and PH as the “space” or niche. finally I get a graph PH vs temperature. part of organism’s environment actually is same. so, I think my results doesn’t prove Gause’s principle. however, I am not sure about my conclusion.

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Is Gause’s Principle Right?


I am doing my biology lab. my lab is about Ecological Niche. bacteria is our model organism. we set temperature and PH as the “space” or niche. finally I get a graph PH vs temperature. part of organism’s environment actually is same. so, I think my results doesn’t prove Gause’s principle. however, I am not sure about my conclusion.

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If The Niches Of Two Organisms Overlap,?


A. the organisms may have to compete directly
B. one organism usually migrates to a new habitat
C. the two organisms will always form a symbiotic relationship
D. both organisms will disappear from the habitat
In his experiments with two species of paramecia, G. F. Gause proved that two competitors cannot coexist on the same limited resources. This outcome demonstrated the principle of
A. symbiosis
B. intraspecific competition
C. succession
D. competitive niche
When two species compete, the niche that each species ultimately occupies is its
A. competitive niche
B. exclusive niche
C. fundamental niche
D. realized niche

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