18. look at the figure above. which position of the earth represents a solstice? a. middle of summer b. beginning of autumn c. beginning of spring d. beginning of winter

really dont know just need some points

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