because they have have negligible mass
Because their tissue are hypotonic with marine environment Jellyfish are Marine habitat. The solution inside the cell contain fewer solute than outside solution ( marine water) The jellyfish cell losses water through osmosis. In addition these cells gain electrolytes by diffusion.
I would say photosynthetic bacteria are the most important, because if they disappeared most of the oxygen in the atmosphere wouldnt be here and complex life like humans wouldnt exist
