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]: Mammals have ____ cervical vertebrae, a number that remains remarkably constant.
[EX A]: seven

[EX Q]: Sexual maturity is reached at ____ years, and females calve every other year.
[EX A]: four

[EX Q]: Many authors believe that minerals have ____ chakra, while animals have three or four.
[EX A]:
one