In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[Q]: Porcine insulin has _ different amino acid and bovine insulin has three different amino acids.
[A]: one

[Q]: Young pandas mature very slowly and are almost _ months old before they are weened.
[A]: six

[Q]: Serum calcium exists in _ separate fractions which are in dynamic equilibrium.
[A]:
three