What is always included in a comparative investigation

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

What advantages does a pedigree have over a written passage?

Por qué crees que los huevos con cáscara se llaman amnióticos?