Sedimentary rocks are formed when soil, rocks, or the remains of dead organisms undergo layering and compaction over a long period of time. the mass of the sedimentary rock is equal to the mass of the a) the soil and rock parts. b) organic materials in the rock. c) inorganic materials in the rock. d) the original items making the rock.

it is D.

Sedimentary rocks are formed when soil, rocks, or the remains of dead organisms undergo layering and compaction. During these processes, mass is conserved. The materials needed to form a certain amount of rock is equal to the mass of the all the original parts making the rock.

i believe it would be the lungs.

examples of nucleic acids are deoxyribonucleic acid (dna) and ribonucleic acid (rna).