3 years ago

The ________ helps keep food between the grinding surfaces of the teeth during chewing.

Biology

1 answer:

miskamm [114]3 years ago

6 0

The answer is the muscular system

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Most species of Cyanobacteria bacteria are enclosed in a?

larisa [96]

Mucilaginous sheath. Cyanobacteria are microorganisms that have survived for a thousand years now. They process and create their food through the photosynthetic mechanisms they possess and this process also includes nitrogen fixation and other biogeochemical process that contributes to most cycles.

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3 years ago

What provides evidence of an increase in animal species at the same time that atmospheric oxygen concentrations increased?(1 poi

hammer [34]

Answer:

stromatolites

Explanation:

"stromatolites is a calcareous mound built up of layers of lime-secreting cyanobacteria and trapped sediment, found in Precambrian rocks as the earliest known fossils, and still being formed in lagoons in Australasia"

Ancient cyanobacteria present in stromatolites are considered as key factor for the increased amount of oxygen in atmosphere. Furthermore, these were considered as first organisms to trap carbon dioxide and release oxygen by the process of photosynthesis.