Question

Bacteria perform the following ecological roles. Which role typically does not involve symbiosis? break down of dead, decaying organic materials in the soil bacterial infection that causes root rot ultimately killing the plant it infects E. coli in your gut making vitamin K bacteria feeding off your dead skin cells

          Bacteria perform the following ecological roles. Which role typically does not involve
symbiosis?
break down of dead, decaying organic materials in the soil
bacterial infection that causes root rot ultimately killing the plant it infects
E. coli in your gut making vitamin K
bacteria feeding off your dead skin cells

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Bacteria perform the following ecological roles. Which role typically does not involve
symbiosis?
break down of dead, decaying organic materials in the soil
bacterial infection that causes root rot ultimately killing the plant it infects
E. coli in your gut making vitamin K
bacteria feeding off your dead skin cells

Added by Jessica C.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

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Solved by Expert Jennifer Hudspeth

01/05/2022

Step 1

Symbiosis refers to a close and long-term biological interaction between two different biological organisms. In symbiosis, both organisms benefit from the relationship (mutualism), one benefits and the other is unaffected (commensalism), or one benefits and the Show more…

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Bacteria perform the following ecological roles. Which role typically does not involve symbiosis? break down of dead, decaying organic materials in the soil bacterial infection that causes root rot ultimately killing the plant it infects E. coli in your gut making vitamin K bacteria feeding off your dead skin cells Bacteria perform the following ecological roles. Which role typically does not involve symbiosis? O break down of dead,decaying organic materials in the soil O bacterial infection that causes root rot ultimately killing the plant it infects O E.coli in your gut making vitamin K O bacteria feeding off your dead skin cells

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Transcript

00:02 Hi there.

00:03 In this question, we are looking for the role that is not a type of symbiosis or does not involve symbiosis.

00:15 Symbiosis refers to a close relationship between two organisms, where at least one of them benefits.

00:36 Okay, so let's look at what we have going on here.

00:39 The first one is soil decomposer in a forest.

00:44 Well, a soil decomposer, is just feeding off of organic material that has been left behind in the forest.

00:53 And while a decomposer is serving a very important role, we don't have a close relationship going on there between two organisms.

01:04 So a soil decomposer is not symbiosis.

01:16 Let's go on and look at the other three options, though, just to make sure that this is, in fact, our answer.

01:21 Okay, the next one is pathogenic, pathogenic.

01:26 Bacteria of humans.

01:30 And pathogenic bacteria in humans is really just the name that we give to a parasite.

01:38 Bacterial parasites, when they infect humans, are called pathogens.

01:43 So in this instant, parasite equals pathogen.

01:55 So really pathogens are bacterial parasites in this instance.

01:59 And parasitism is, of course, a form of symbiosis.

02:03 So yes, this is a form of symbiosis...

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