Which rock layer is the newest and why?
a. supai group because it is middle layer b. kaibab limestone because it is top most layer c. hermit shale because it is oldest type of rock d. tapeats sandstone because it is bottom layer

c is the answer : )               your welcome

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.

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 

make   gliitsh plesea   !