instruction:
You are given a sentence and your task is to generate another sentence that supports the given input.
question:
Viral vectors are a tool commonly used by molecular biologists to deliver genetic material into cells.
answer:
A viral vector is the name for a tool commonly used by molecular biologists to place genetic material into cells.


question:
Weather fronts mark the boundary or transition zone between two air masses and have an important impact upon the weather.
answer:
In weather terms, the boundary between two air masses is called front.


question:
A 24-hour period during which the earth completes one rotation.
answer:

It takes 24 hours for the earth to make a complete rotation of its axis.