Adrawing that shows information like a graph

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.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above