Yes the answer would be true
sludge
<span>Sewage treatment is also known as wastewater treatment. It is
a process whereby contaminant is removed from wastewater. Thus, chemical,
biological and physical process are commonly used to remove contaminants from
wastewater and the by-products of wastewater treatment is usually inform of
solid waste known as sewage sludge.</span>
The selective pairing of adenine (A) with thymine (T) and guanine (G) with cytosine (C) is based on the number of hydrogen bonds established between one of the purine bases and the one pyrimidine bases
The answer to this is C because humans don't have cell walls and if you are looking at an onion it has a cell wall because it is a plant.
(C) earth's outer iron core
this is because iron is magnetic and therefore forms a strong magnetic field