What purpose does defining the area of investigation in excavation of skeletal remains serve? A. determines the direction in which skeletal remains lie B. helps to plan another excavation C. exposes the skeletal remains completely D. obtains small bone fragments E. helps in lifting the remains

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

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