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: Neuroblasts delaminate in five waves spanning approximately ____ hours.

A: three
****
Q: All birds have ____ legs with four toes each.

A: two
****
Q: Fusion is similar to that described in Chlamydomonas, forming a zygote with ____ flagella.

A:
four
****