Petrified wood is a rock that i have seen
They will be the same, because in mitosis the chromosomes are replicated exactly. In short, the chromosomes become short and thick, are then pulled apart, so you end up with two pairs of chromosomes, then cytokinesis splits the cytoplasm in to two separate ones, creating the daughter cells
They can accidentally catch dolphins, turtles, even orcas. Greenpeace is actively trying to get them banned.