Which general function does lactose perform?

What two fields of study provide the core information that is used to classify organisms?

Are salt and soap nutrients or toxins for yeast? explain.

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.