OL 1409-Fall18-DR. B ER Jump to... Lauren Galvez 9/16/2018 07:00 PM 45.5/1009/12

Question

OL 1409-Fall18-DR. B ER Jump to... Lauren Galvez 9/16/2018 07:00 PM 45.5/1009/12/2018 02:16 PM 15 of 28 is a distinguishing characteristic of all microbial mats? o A colony of a single type of bacterium or other microorganism is kept together in a thin mat by Each layer in the mat con resources available in the layer sists of those bacteria or other microorganisms that are able to use the s form a mat covering the sediment in ponds or marshes that have little dissolved oxygen in the water The fossilized remains of mats mats appear as layers in rock formations of ancient microorganisms and the sediment that collected on the

Explanation / Answer

The characteristic feature of all microbial mats is that bacteria and other microorganisms settle into different layers based on the resources present in that layer and who is able to use them best. (Option 2 is correct)

Stromatolites are formed when Calcium carbonate and sediments adhere to the sticky covering produced by microbial mats. (Option 4. this is not the answer, but just letting you know what they are)

The other two options are specific. Not encompassing ALL mats, as asked in the question.

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