My(myo) may be is the right one
Answer:
the disappearance of lions
Cell theory is one of the foundations of biology. The observation of Robert Hooke,Anton Van Leeuewenhoek,Matthias Schleiden,Theodor Schwann,Rudolf Virchow, and others led to the devolepment of the cell theory.
The purpose of spindle fiber is to divide the chromosomes in a parental cell to make them into two daughter cells.
D. a cell wall.
reasoning: in a prokaryotic cell, they have no nucleus or organelles. a cell wall is the only answer that is neither of those.