Archaea differ from bacteria in that archaea Archaea differ from bacteria in that archaea lack nuclei. are prokaryotic. use organic compounds for food. have cell walls composed of substances other than peptidoglycan. reproduce by binary fission.

have cell walls composed of substances other than peptidoglycan

Explanation:

Archaea are single celled microbes with the absence of cell nucleus and cell membrane-bound organelles just like bacteria. Archaea and bacteria both reproduce by binary fission. As it relates to their gene structure, they both have a circular chromosome.

Compared to bacteria, archaea lack peptidoglycan in their cell wall, but contain psuedo-peptidoglycan that is similar to peptidoglycan in physical structure and function, but not in chemical structure.

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 

looks like the answer is     c     to me!