TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Manatees swim two to _ miles per hour.

SOLUTION: six

PROBLEM: Water is able to diffuse freely between the _ cells.

SOLUTION: two

PROBLEM: Fusion is similar to that described in Chlamydomonas, forming a zygote with _ flagella.

SOLUTION:
four