Septic tanks can leach nitrates into water systems, like rivers and aquifers. however, some homes are too far away from municipal treatment facilities to use anything else. what can county officials reasonably do to ensure septic systems are not harming their community?

The county officials can ensure that each septic tank has a drain-field alongside it. A drain-field must have a suitable type of soil that is capable of treating the waste before it reaches groundwater. The drain-fields should be well aerated to enable breakdown of nutrients such as nitrates.

They could also introduce holding tanks that are frequently emptied using exhausters to the treatment facilities

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.