Which of the following list all the elements that are present in a molecule of posasslum carbonate K2CO3 A)carbon and oxygen

B)phosphate and calclum

C)potassium, carbon, and calcium

D) phosphate oxygen calcium

Ascientist conducted an experiment and discovered that certain plants grow faster when given a particular amount of fertilizer. anouther scientist conducted the same experiment and got similar results. which concept does this best illustrate? a) repetition b) replication c) precision d) validity