That it is weak? i dont know
If you have variation, differential reproduction, and heredity, you will have evolution by natural selection as an outcome. It is as simple as that.
Answer:
Chemical composition
Explanation:
Sometimes Earth's layers are called crust mantle, and core. These are the names of Earth's layers based on their Chemical composition.
Answer:
Rift valleys are Formed from either from the action of tensional forces in the crust or from the action of compressional forces!
And they move due to the force of gravity!
The block mountain (horst) is left standing higher above the sunken graben!
