Body waves can travel through the earth's inner layers, but surface waves can only move along the surface of the planet like ripples on water. Earthquakes radiate seismic energy as both body and surface waves. ... The P wave can move through solid rock and fluids, like water or the liquid layers of the earth.
Tissues and organ systems.
here is the full chart:
cell --> tissue --> organ --> organ system --> organism
(think: group of [insert former here])
e.g. tissue=group of same cells
(et.al)
Ribosomes attached to the ER
B is the nucleoid
D is Ribosomes
Hope this helps :)