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.

Power is derived from ____ sources, money and people.
two

Endospores exhibit ____ signs of life, being described as cryptobiotic.
no

Doxycycline antibiotics twice a day for ____ days is also effective.

five