Which is the only cell organelle visible in a prokaryotic cell?

$(a)$ Write two points of difference between the nuclear region of a bacterial cell and the nuclear region of an animal cell.
$(b)$ Which structure present in the nuclear region of a living cell bears genes?

What is a nucleoid?

Which of the following is not a function of the vacuole?

Amoeba acquires its food through a process,termed

Differentiate between diffusion and osmosis. Write any two examples where a living organism uses osmosis to absorb water.