Which of the following statements st describes scientific research

Imagine ? person stepping on a pin and pulling his or her foot way look at the réfléchir arc of the scenarios below

How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.

When ash and dust begin to settle on the ground, they eventually become compacted by