Which of these characteristics would describe a fungus? a) cells all contain chloroplasts for photosynthesis b) cells all contain a nucleus and cell wall c) cells do not contain a nucleus; organisms are all single-celled d) cells do not have a cell wall and may or may not contain a nucleus

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