<span>Cellular junctions are the areas that hold the adjacent cells together and allows them to communicate. They are made of multi-protein complexes and exist within the tissues of the cell.</span>
Answer: D. A growth factor (a protein that controls cell division & growth).
The answer would be a dangerous process, this is because the greenhouse effect traps gasses such as CO2 and other harmful gasses emitted from the Earth, that can ultimately lead to problems in the future.
The greenhouse effect is also the reasoning behind why scientist believes in Global warming and climate change.
Plus, the greenhouse effect is neither natural, new, nor artificial.