instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Mares normally give birth to their first foal when they are between _ and six years of.
answer:
three


question:
Atoms are most stable when they have _ electrons in their outer electron energy level.
answer:
eight


question:
Parthenogenetic teiids arise when _ sexual species hybridize.
answer:

two