Answer:
The fossil record helps paleontologists, archaeologists, and geologists place important events and species in the appropriate geologic era.
Explanation:
It is based on the Law of Superposition which states that in undisturbed rock sequences the bottom layers are older than the top layers.
Answer:
its too long which one you want
Explanation:
Say any one question answer!!!
Algae and nitrogen-fixing bacteria are photosynthetic organisms.