So the independent variable is the thing that is changed in an experiment and you want to change the amount of rainfall the cactus gets as the hypothesis is about rainfall so the answer would be c). Hope this helps :)
Answer:
Nope
Explanation:
that's only used in plants to make them grow or stronger
Answer:
An acid is a substance that donates hydrogen ions. ... Now there are more hydrogen ions than hydroxide ions in the solution. This kind of solution is acidic
An embryonic stem cell is the first cell in the embryo, this is what creates a human and helps more cells to form.