Answer:
1. They keep casts to preserve the real fossils.
2. Maybe someone would steal a fossil and sell it on the dark web?
3. They keep casts to keep the real fossils in prime condition, by that I mean like undamaged.
Answer: True
Explanation: The cell was placed in a hypotonic environment meaning that the concentration of water was higher outside the cell membrane than inside so water entered the cell.
No our galaxy does not contain any planets outside our solar system
