Answer:
A-all of the answers are correct
Explanation:
In DNA replication, the strands come apart and creat a "new copy" of the original strand.
I'm 90% sure that the answer is D). all of these
The controlis the plant with just water. The independent variable is the plants. The dependaent is the amout of salt in the water.
The indepedent is the trees. The dependent is the greenhouse or no greenhouse.