Answer:
Prokaryotes lack a true nucleus with well defined nuclear membrane and other membrane-bound organelles. Mitochondria are the double membrane bound organelle and hence is absent in prokaryotes. Mesosome is an extension of the cell membrane presence in the cytoplasm as infolding and serves to increases surface area and as a site for cellular respiration in prokaryotes. Histones are positively charged proteins that serve in the packaging of negatively charged eukaryotic DNA but are absent in prokaryotes.
So, the correct answer is option A.(DNA is complexed with histones).
Mitochondrial DNA mutation occurs at a constant rate throughout history. Thus, each different base in Mitochondrial DNA is able to show just how long ago the 2 species diverged from each other.
Hope this helps! :)
There could be a lot of reasons. To help break down food for the plants, kill off bad and harmful things that might damage the plant.
Adipose cells first is a connective tissue cell that is specialized to synthesize and contain large fat or globules. Adipose cells can be categorized in two. the first is the white adipose cells, which contain large fat droplets and only a small amount of cytoplasm and flattened, non centrally located nuclei.
