Prove or disprove: if h is a normal subgroup of g such that h and g/h are abelian, then g is abelian

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?