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

[EX Q]: Corn has _ adaptations.
[EX A]: three

[EX Q]: Oceanographers now understand the oceanic circulation much better than _ years ago.
[EX A]: ten

[EX Q]: Green lines represent the boundaries between the _ hemispheres.
[EX A]:
two