Why would you expect strontium to be chemically more similar to calcium? A; They are in the same family/group.
B; They are in the same period.
C; They have the same atomic number.
D; They have the same atomic mass.

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 fossil record provides evidence of a common ancestor to many species.