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

[EX Q]: Every muscle is made up of _ types of fibers.
[EX A]: two

[EX Q]: Conserved residues make similar contacts in _ repressor-operator complexes.
[EX A]: two

[EX Q]: Cats There are thirty _ recognised species of cats and a whole host of subspecies or races.
[EX A]:
five