How do the thin membranes of the alveoli in the lungs allow the lung to function? O A. They provide strength for the lung tissues,
O B. They allow gas exchange to occur more easily.
C. They allow nutrients to be released into the lung,
D. They allow a quick response to signals from the brain.

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.

What is the importantence of the carbon and nitretan cycles in the environment

Which of the following best describes the relationship between glucose and complex molecules such as hormones?