In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Y are _ morphisms and g is quasi-compact and surjective.
[EX A]: two

[EX Q]: Prokaryotes mean they have _ nucleus in which they store genetic material.
[EX A]: no

[EX Q]: Spacecraft starting from the surface of Earth has a _ initial speed .
[EX A]:
zero