<span>A prokaryote is a unicellular organism that belongs to either the domain Bacteria or the domain Archaea. Therefore, unlike a eukaryote, the prokaryote lacks in a nucleus and other organelles. The first organisms that appeared about 3.5 billions years ago were prokaryotes. They developed primitive forms of photosynthesis without oxygen as a waste. The first photosynthesizing prokaryotes appeared about 2.7 billion years ago which led to the changes in Earth atmosphere and consequently organisms dependant on oxygen could arise.</span>
The dependant variable would be the salmon, because they depend on the water and pollution levels to give a result.
A squirrel stores food in a tree hole.
The cytoskeleton is the grid-like lattice of protein f<span>ibers. The function of the cytoskeleton is that it maintains the shape and support of the cell, and also assists with the organelle movement. </span>
