Primary succession is when, for example, a volcano explodes and there is nothing left and even the soil is ruined. It would take at least a hundred years for the land to be like it was before the volcano erupted. Secondary succession is when, for example, a wild fire happens but the soil is not ruined. It would take at least 25-50 years for the land to be like it was before the fire.
Phototropism, Gravitropism, Thigmotropism, <span>Hydrotropism and Heliotropism</span>
If your findings disproves your hypothesis then your hypothesis is probably wrong.
