TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Macroevolution happens when forces of evolution work over a long period of time.

SOLUTION: What happens when forces of evolution work over a long period of time?

PROBLEM: The cell starting meiosis is called a primary oocyte.

SOLUTION: The cell starting meiosis is called a what?

PROBLEM: Topsoil layer of soil, essential for farming, has the highest proportion of organic material.

SOLUTION:
What layer of soil, essential for farming, has the highest proportion of organic material?