The variable in an experiment is an attribute that is manipulated by the experimenter under controlled conditions.

archaebacteria are found in in forest soil.

hope i spelled it right lol

hope i

-lavira: )

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 

the answer is c on e2020, bud.