Dna replication involves producing new copies of dna molecules. how many individual dna strands exist after one molecule of dna has been replicated? a. 2 b. 1 c. 4 d. 3

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.

One reason scientists are trying to develop fuel sources from corn and sugar is because these sources are renewable fossil fuels are being depleted these crops can be widely grown all of the above