Hi there! What is weathering?

Also im kinda bored sooo if you wanna like talk or something im free :/

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 list is in order from simplest to most complex? a bacteria - virus - plant - protist b protist - bacteria - virus - plant c virus - bacteria - plant - protist d virus - bacteria - protist - plant

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry