instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Negative growth rate results when birth rates fall even lower than death rates.
answer:
What results when birth rates fall even lower than death rates?


question:
Learned behavior is adaptive because they are flexible, capable of changing if the environment changes.
answer:
What kind of behaviors are adaptive because they are flexible, capable of changing if the environment changes?


question:
Ancient greeks mistook sponges simple sedentary animals for plants.
answer:

Ancient greeks mistook what simple sedentary animals for plants?