Uh the answer is B. Humans
Answer;
-Gap junctions
Explanation;
-Gap junctions are a specialized intercellular connection between a multitude of animal cell-types. they are organized collections of protein channels in cell membranes that allows ions and small molecules to pass between adjacent cells.
-Gap junctions allow the exchange of ions, second messengers, and small metabolites between adjacent cells and are formed by two unrelated protein families, the pannexins and connexins.
What I Think It Is, Global Warming :)
Answer:
The answer is A (2.5)
Explanation:
I looked the question up for you but since there is not a chart I can not give you an accurate explanation. Good luck !