What happens to the dirt and matrix from each grid? it is discarded as trash it is burned to avoid contamination of the site it is collected for further analysis it is put back in the grid after the fossils have been removed?

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds