Scientists can determine the age of a substance using a method that compares
the amounts of different forms of carbon atoms
present in the substance. Is this method more useful
for organic substances or inorganic substances?

dude i stopped reading after the first 7 words but hey you seem real smart thats awesome have a great day

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 think the answer is a.keratin is the pigment responsible for skin color.

want or the answer