Energy is required in order to add a nucleotide to the growing strand of dna during replication. from where does that energy come?

When water freezes, it . contracts expands

Nasa scientists must work together to make sure that everything is correct and accounted for when launching a shuttle. besides a physicist, what other type of scientist would be in making sure that the shuttle has the appropriate type and amount of fuel to reach its destination?

18. which statement about cancer is true?