Libro de ciencias biología primero de secundaria

How are viruses and bacteria different?

Which of the following is not a way in which a vascular plant's xylem and phloem are similar?

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.