What peculiar feature did darwin find in the tortoises on the galapagos islands?
a. they were domesticated.
b. they had adapted to their surroundings.
c. they had access to better food sources.
d. they were a better breed than regular tortoises.

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