What are the molecules that make up the DNA rail?

Someone me with this: a mineral' is determined by its actomic structure.

Food webs - transferring energy and matter from one level to another. here you see four food webs. one or more are incorrect. which food web(s) show the correct sequence of organisms, from start to top level consumer? a) a b) d c) c d) a and d

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?