Biochemical oxygen demand is . Group of answer choices measured in a test that passes the sample through a filter and then weighs it unaffected by secondary sewage treatment all of the answers are correct a measure of the amount of oxygen that may be used up when a wastewater enters a stream usually about 5% in untreated sewage

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).