Both prokaryotes and eukaryote cells have this structure. it maintain homeostasis ant is a boundary between the inside of the cell and the outside environment. it is the

IT's cell membrane because it maintains homeostasis by controlling what enters the cell and what exits it.

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.