These friendly creatures love to talk and play using a variety of sounds to tell their story ? It’s a scavenger hunt pls help

They are dolfins probably

Explanation:dolfins are friendly and by variation of sounds they communicate

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