During the mechanical step in the sewage treatment plant I. solid waste material settle out. II. bacteria break down 85%-90% of organic matter. III. chlorine, ozone, or ultraviolet light are used.

I. solid waste material settle out

Explanation:

In the primary sedimentation stage, sewage flows through large tanks, commonly called primary sedimentation tanks. The tanks are used to settle sludge while grease and oils rise to the surface and are skimmed off. Primary settling tanks are usually equipped with mechanically driven scrapers.

On the other hand, bacteria break down 85%-90% of organic matter is a biological step in the sewage treatment plant. Chlorine, ozone, or ultraviolet light are used in the chemical step of the sewage treatment plant.

the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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the answer is b)3/8x+1