Young tadpoles breath like fish. what structure enables them to breathe underwater a. tracheae b. skin c. alveoli d. gills

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

If the rna molecule in a human has the nucleotide sequence of guu, this would the amino acid valine would be needed to make the protein. how would this cha process was occurring in a mushroom?