B because you can get cancer badly by smoking people smoke cause of stress the stress makes it worse to smoke
Answer:
D
Explanation:
Icebergs form when chunks of ice break off from glaciers
<span>The proteins of the electron transport chain are located in the inner membrane of the mitochondria.
Electrons are passed from one protein of the transport chain to another in a series of redox reactions, making the proton gradient which is then used to make ATP.</span>
Human stem cells haven’t specialized in to create an organ. This means that they can be manipulated to create a variety of organs for organ transplant and therefore lowers the risk of rejection
