Question

To be a useful index fossil, a species must have been rare.

Answer 1

This statement is false.

In order to be a useful index fossil, the fossil needs to be common so that they can be found in different sediments and therefore serve as an index. They also need to be easy to identify and be broadly distributed. If fossils don't have these characteristics, it is hard to find them and recognise them in two different sediments.

Answer 2

Answer:

The answer is False.

Explanation:

With the end goal to be a valuable file fossil, the fossil should be normal so they can be found in various dregs and thus fill in as a list. They likewise should be anything but difficult to recognize and be comprehensively dispersed. On the off chance that fossils don't have these qualities, it is elusive them and remember them in two distinct dregs.