Mosses growing on the surface of a rock producing pits in the rocks

answer; 60-100; beats per minute

true, i don't really know what you're asking but from the info you provided im guessing the answer is true.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

your answer is going to be physical weathering