I believe the bone system that red marrow belongs to is D. Skeletal system.
Sublimation is a straight transition from solid to gas. This occurs in dry ice as it the ice, which is a solid state, does melt and have a liquid form. Therefore it is called dry ice as it doesn’t produce any liquid
Cells with large numbers of mitochondria have a high energy demand
DNA gets compact only during cell division and are called chromosomes. On other conditons, it forms a network of thin threads called chromatin network.
