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.

[Q]: Cleavage is good in ____ directions at right angles.
[A]: two


[Q]: Inversions have the classic double loop at meiosis, and have ____ crossovers when heterozygotes.
[A]: no


[Q]: Alpacas have ____ sets of teeth for processing food.
[A]:
two