Answer: He grew a willow tree in a weighed amount of soil. After five years, he discovered that the willow tree weighed about 74 kg more than it did at the start. As the weight of the soil had hardly changed, van Helmont concluded that plant growth cannot only be due to minerals from the soil.
Answer:
part 1- polymers part 2- monomers
<span>although the models of genetic drift predicts the genetic diversity.
I put this in and got 100% for the question ^^</span>
