Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

[EX Q]: Prions are protein molecules which have ____ metastable states.
[EX A]: two

[EX Q]: Maps have ____ or more bar scales, each in a different unit of measure.
[EX A]: three

[EX Q]: Biological islands are of ____ general types, geographical and ecological.
[EX A]:
two