Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Negative growth rate results when birth rates fall even lower than death rates.
What results when birth rates fall even lower than death rates?

Modern members of the reptiles group live in many different habitats and are found on every continent except antarctica.
Modern members of what broad animal group live in many different habitats and are found on every continent except antarctica?

Fermentation does not use oxygen.

What type of respiration does not use oxygen?