Is unicellular, prokaryotic, and has a cell wall that contain peptidoglycan.

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg 

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.