If you were given a cylindrical structure cut from part of plant how could you tell whether it was a piece of stem or a piece of root a:with the naked aye
b: with the aid of a microscope or hand lens

That is true! many fish species traveled to the u.s. because of it.

Volcanoes make new rocks so not ahotspots are the the stuff that makes volcanoes mid atlantic ridge(mar cause i’m lazy) is a constructive plate boundary so it makes sense that new rocks would be found near it, also the mar is in the middle of the ocean so it fits the description deep ocean trench, umm, there’s no ocean trenches to where you’re goingso the mar is most likely the answeri wouldn’t trust me but hey why not