Describe the chemical structure of a cell membrane

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

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.

Most of the carbon on earth is stored in the form of