A tree is able to speed up erosion because it break up rocks. This can happen as it’s roots grow through rocks, the water breaks through rocks, etc.
It can slow erosion down because it can act as a barrier to the elements that erode.
This is more a biology question but anyway....
G = the dominant gene aka. the one that is most likely to be seen because it is stronger than g. GG and Gg will both show the dominant gene's characteristics.
g = the recessive gene. The only way this one's type can be seen in gg form with no dominant gene to overpower it
The difference I think is the fact one has DNA and the other doesn't.
