Which hormone is produced mainly in the stomach and regulates secretions of gastric juice?
a. gastrin

b. secretin

c. pepsin

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 

i dont know it at allnow im just getting points at this pint