From which type of material does biogenous sediment form? a : rocks on land b : manganese nodules c : once-living organisms d : cooled magma

C: once- living organisms

Biogenious sediments are the sediments, which can be found on the oceanic floor. These sediments consists of biological wastes secreated by marine organisms, like feces, discarded shells and decomposed or partially decomposed remains of dead animals and plants. These are finely grained sediments and 30 percent of composition belongs to the shells of microorganisms. The shells are source of calcium and silica in the sediment.

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.