A. the mitochondria and chloroplasts are much different in structure than bacteria
The correct answer to the question above is cytoskeleton. Microtubules, microfilaments, and intermediate filaments make up the cytoskeleton, which lies beneath the plasma membrane and provides support, movement, and shape for the cell. These structures definitely form cytoskeleton for the support and structure.
Depending and what kind of whale, yes
The first one is commensalism. The second one is mutualism. The last one is parasitism.
I would say fossilization
