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: Marshes are shallow wetlands less than ____ meters deep.

A: two
****
Q: Primates have ____ digits on their forelimbs.

A: five
****
Q: Zebrafish embryos have three or ____ identifiable primary motoneurons per hemisegment.

A:
four
****