Answer:
One possible cause of persistent sadness could be depression
Explanation:
I'm pretty sure that the cell membrane acts as the cell wall if you understand what I'm saying. The cell membrane will be the outermost structure.
All living things are made up of more than one cell
Answer:
Mitosis
Explanation:
Mitosis is a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus.
