Which statement about this diagram is correct? a. molecule 1 is rna, which contains thymine. b. molecule 2 is rna, and it is the only nucleic acid that contains four types of bases. c. molecule 1 is dna, which is a double helix. d. molecule 2 is dna, which can bond with another dna molecule.

Kidney stones are tiny crystals of calcium or magnesium that block the narrow sections of the excretory system. which symptoms would a person with kidney stones experience? a. inability to store urine; pain in the bladder b. inability to store urine; pain in the urethra c. reduced urine flow; pain in the bladder d. reduced urine flow; pain in the urethra