Where do the two chains of nucleotides bond to each other

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from

1. fold your hands together so your thumbs cross over ,and look at your thumbs. which thumb feels most "comfortable" on top is actually controlled by a gene. the left thumb folding over the right thumb is a domi

Plz quick a natural resource that is replaceable through a cycle in nature or sustainable practice is called a? the subject is science