If the mystery fossil of an organism shows the following characteristics:

Question

Bony skeleton
Amniotic egg
Hair

Which of the following organisms would not be considered as the mystery fossil?

Answer 1

The organism that would not be considered as the mystery fossil based on the given characteristics is a fish. The other three options, reptile, mammal, and bird, can all have bony skeletons, amniotic eggs, and hair. Fish, however, do not possess hair, and their eggs are not amniotic.