25. Cell structure, cell function, metabolism, and
hair, skin and eye color are all examples of?

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

answer: 45

explanationyou have to add as well to be it could be

a- all cells come from pre-existing cells

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