The parathyroids are responsible for regulating proper levels of which elements in the blood?

the index of refraction of the second medium is higher. i just took the test trust me !

correct answer is a. and d.

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