There are many different ways that cells can connect to each other. The three main ways for cells to connect with each other are: gap junctions, tight junctions, and desmosomes. These types of junctions have different purposes, and are found in different places.
Answer: B) ATP to ADP
This reaction is termed as ATP hydrolysis.
ATP ( adenosine triphosphate) conversion to ADP ( adenosine diphosphate) is an energy producing reaction ( exothermic reaction). ATP contains high energy bonds called phosphoanhydride bonds. Thus, when this bond is broken down, ATP is converted to ADP and Pi ( inorganic phosphate) and releases large amount of energy.
HIV is thought have originated by 
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A. apes passing the disease to hunters.✔
Inclined plane allows the same work to be done with a smaller force exerted over a greater distance.
