TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: When a sperm penetrates the egg, it triggers the egg to complete meiosis.

SOLUTION: When a sperm penetrates the egg, it triggers the egg to complete what?

PROBLEM: Collision theory states that chemical reactions occur when atoms, ions, or molecules collide.

SOLUTION: What states that chemical reactions occur when atoms, ions, or molecules collide?

PROBLEM: Vector is a measure that has both size and direction.

SOLUTION:
What is a measure that has both size and direction?