Answer:
1) Weathering breaks down and dissolves rocks.
2) Wind and Rain as well as erosion.
3) Gravity, Wind, Water.
<span>several extreme environments on Earth, buried DEEP, living in hot, dry desert sand.. ETC</span>
A unique feature of the nucleus is that it disassembles and re-forms each time mostcells divide. At the beginning of mitosis, the chromosomes condense, the nucleolus disappears, and the nuclear envelope breaks down, resulting in the release of most of the contents of the nucleus into the cytoplasm.
Hope that helped