Bacteria perform the following ecological roles. Which role typic...

Question

Bacteria perform the following ecological roles. Which role typically does not involve symbiosis?
a. skin commensalist
b. decomposer
c. gut mutualist
d. pathogen

Accepted Answer

Hello everyone. So today's video is going to be very short and sweet. So let's jump straight into it. Bacteria are useful. You know the following association Except so this except term tells us that we're looking for the exception. So the way that bacteria are not useful to certain species. So that's straight into the problem. We have the bacteria can act as skin comments. Als Well this is true because if you've ever heard of the skin microbiome the bacteria present in the human skin that help us fight pathogens. So this is true. Moving on to answer choice B and C. We have the association with fungi in recycling nutrients and the mutual isT IQ association in human God. These two are both true and they have to do with nutrition. So just like we have a screen microbiome we have also a microbiome that's composed by many different species of bacteria as well as our own cells. These species of bacteria have a mutual relationship with us where they help us recycle nutrients, create nutrients and so on. There are also present in fungi and they have similar functions. So these two are also correct and we can cancel it out as not being the exceptions to our question. Finally we're left with the choice d pathogenic bacteria causing diseases. If we look at our question, we're looking for ways in which bacteria are not useful. So pathogenic bacteria causing disease. Is this not does not really sound like a useful thing for most other organisms. So we're going to highlight this as being our final answer. Thank you very much for sticking around until the end of this video, and I really hope it helped you.

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