instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Polymorphism occurs in all species and the mandibles bear _ teeth.
answer:
four

question:
Bull sharks are a 'requiem' species, reaching up to _ feet in length.
answer:
ten

question:
Lemmings survive the cold primarily for _ reasons.
answer:
two