Are carbohydrates pure substances? (include your reasoning)

What are tissues? a groups of tissues that work together b basic units of structure and function c groups of cells that perform the same function d multiple organs that perform a major function

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that

What term describes a doctor who becomes a specialist by meeting standards beyond those of getting a license and passing a test in the specialty area?