In the experiment, "Do white cats eat more than black cats?" the independent variable would be: the color of the cat.
how much each cat weighs.
how much food each cat eats.
the temperature of the food.

every el niño cycle is different. every year.

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