TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Surface tension is responsible for the fact that small insects can walk on water.

SOLUTION: Surface tension is responsible for the fact that small insects can do this on water?

PROBLEM: The human body has as many as two trillion lymphocytes, and lymphocytes make up about 25% of all of leukocytes.

SOLUTION: The human body has as many as two trillion lymphocytes, and lymphocytes make up about 25% of all of what?

PROBLEM: A(n) cell is the lowest level of organism that can perform all activities required for life.

SOLUTION:
What is the lowest level of organism that can perform all activities required for life?