When new information leads to new and different conclusions, it is important to be able to adapt to the most up-to-date conclusions. If conclusions are rigid and fixed regardless of any new information that may come to light, then they are not truly based on the facts under discussion.
Answer: Complementary base- pairing creates a very stable structure
Explanation:
A useful index fossil must be distinctive or easily recognizable, abundant, and have a wide geographic distribution and a short range through time.