Question

Which piece of evidence do scientists refer to back their idea that life-forms have changed (or evolved) over time?

Answer 1

In older rock layers we find fossils of living things that no longer exist on earth.

Explanation:

Scientists often refer back to fossils found within sedimentary rocks to back their idea that life forms have changed over time.

Fossils are the preserved remains of organisms that once lived on earth. Special conditions must be in play before an organism can become a fossil like presence of hard parts.

• Fossils are indicators of ancient life forms that has once lived.
• They provide us with important clues to the nature of organisms that existed in time past.
• Using phylogenetic relationship with their present day ancestors, it is possible to trace the evolutionary history of a specie.

Learn more:

Evolution brainly.com/question/6912833

Fossil brainly.com/question/12790206

#learnwithBrainly