Why do peacocks spread their feathers?

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.

What is the difference between an igneous, sedimentary and metamorphic rock

What is the name of the type of cell division that occurs in the prokaryotic cell cycle