TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Environmental changes is most responsible for the extinction of most species of plants and animals that have lived on earth.

SOLUTION: What process is most responsible for the extinction of most species of plants and animals that have lived on Earth?

PROBLEM: It takes about one year for earth to orbit the sun.

SOLUTION: Which of these takes about one year to complete?

PROBLEM: Fruit fly and brine shrimp hox genes have evolved independently for 400 million years long.

SOLUTION:
Fruit fly and brine shrimp hox genes have evolved independently for how long?