It is observed in the fossil record and in experiments with rapidly breeding insects or virii.

These are species that can breed rapidly under suitable conditions and subsequently become gregarious and migratory when their populations become dense enough.

And it must breed rapidly, so that its evolution could be directed and controlled as swiftly as possible.

The crew must act quickly, or become overwhelmed by the rapidly breeding menace.

Medflies breed rapidly and eat fruit with a voracious appetite.

These are species that can breed rapidly under suitable conditions.

These are species which breed rapidly under suitable conditions.

Scientists use mice for genetics experiments because they breed rapidly and because few other mammals are as easy to handle.

Some species can breed rapidly under suitable conditions and subsequently become gregarious and migratory.

Their survival is aided by their ability to breed rapidly.