Evidence that cytoskeletal elements have ancient origins comes from the:
A)sequence similarities of cytoskeletal elements when comparing distantly related organisms.
B)presence of cytoskeletal elements in both eukaryotes and prokaryotes.
C)observation that both prokaryotes and eukaryotes use cytoskeletal elements to assist cell division.
D)ability to form functional hybrid microfilaments from actin monomers taken from distantly related organisms.
E)All of these choices are correct.

Question

Quizplus · Accepted Answer

All of the choices provide evidence that cytoskeletal elements have ancient origins. Sequence similarities of cytoskeletal elements in distantly related organisms suggest that they originated from a common ancestor. The presence of cytoskeletal elements in both prokaryotes and eukaryotes suggests that they likely existed in the last common ancestor of these two groups. The observation that both prokaryotes and eukaryotes use cytoskeletal elements to assist cell division further supports their ancient origins. Finally, the ability to form functional hybrid microfilaments from actin monomers taken from distantly related organisms suggests that the basic structural components of cytoskeletal elements were established early in the evolution of life.

Evidence That Cytoskeletal Elements Have Ancient Origins Comes from The