Imagine carefully weighing a metal can, leaving it out in the rain for weeks and weeks

until it was very rusted, and then carefully weighing it again. Would the can be heavier or

lighter after it was rusted? Why?

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 

actually the answer is c

answer(9) nine abilities;