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.

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?

People with one sickle cell allele are not likely to get malaria. what is this an example of?

If you want to double a batch of brownies you must have double the ingredients before you start cooking similarity a cell must double its contents including its dna prior to dividing