How do bacteria get nutrition?

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DonSchaeffer
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How do bacteria get nutrition?

#1 Post by DonSchaeffer » Thu Sep 10, 2020 8:38 pm

I suspect they are at the bottom of the food chain. I think I learned that bacteria don't eat and digest but somehow get nutrition by making changes in the chemistry of other life forms. It's a mystery to me. Can anyway explain it?

apochronaut
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Re: How do bacteria get nutrition?

#2 Post by apochronaut » Fri Sep 11, 2020 12:04 am

It depends on the species. Some are autotrophs , which manufacture food internally by utilizing, for instance light through photosynthesis. Others are heterotrophs, absorbing compounds from their environment . Some release enzymes that break certain exogenous compounds down so that they may be absorbed.
Generally, they all must absorb compounds through their cell wall and membrane through diffusion , which must overcome the impermeability of those structures as well as sometimes a concentration gradient, so in some species a form of active transport takes place in order to get needed compounds into the cell.
They cannot engulf anything , like some Eukaryotes can.j

DonSchaeffer
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Re: How do bacteria get nutrition?

#3 Post by DonSchaeffer » Fri Sep 11, 2020 1:06 am

That is really interesting. In some ways the behave more like plants than animals.

Element 56
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Re: How do bacteria get nutrition?

#4 Post by Element 56 » Fri Sep 11, 2020 1:24 am

DonSchaeffer wrote:
Fri Sep 11, 2020 1:06 am
That is really interesting. In some ways the behave more like plants than animals.
And yet they are neither!

DonSchaeffer
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Re: How do bacteria get nutrition?

#5 Post by DonSchaeffer » Fri Sep 11, 2020 3:56 pm

Why are they neither? At one time I think they were considered to be in the vegetable kingdom, along with algae.

Element 56
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Re: How do bacteria get nutrition?

#6 Post by Element 56 » Fri Sep 11, 2020 8:03 pm

DonSchaeffer wrote:
Fri Sep 11, 2020 3:56 pm
Why are they neither? At one time I think they were considered to be in the vegetable kingdom, along with algae.
They are classified under the Monera kingdom. I am no expert but I guess it's because of the differences in how they eat. Like plants some do use Photosynthesis as Phil said and some can use chemosynthesis. Maybe someone with more knowledge can offer a better answer. I do find bacteria to very interesting. I skimmed an article the other day about Cyanogenic bacteria being used to extract precious metals from waste.

https://pdf.sciencedirectassets.com/270 ... ype=client

Kirby

DonSchaeffer
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Re: How do bacteria get nutrition?

#7 Post by DonSchaeffer » Fri Sep 11, 2020 11:20 pm

Thanks. They really are interesting--so alien--yet so native to the earth.

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