Your two answers would be
C. Not man made
D. From the earth
Evolution causes genetic material to adapt into variations that are beneficial for a species to survive
Answer:
The four main ways are freeze-thaw, onion skin (exfoliation), chemical and biological weathering.
Explanation:
Cell membranes are important because they protect the cell and control the materials that flow in and out of it. Lipids are needed in order to create the membranes in the cell.
