What is the difference between nitrogen 14 and nitrogen 15

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 is true of sea slugs in these orders

This is the interaction of two organisms where one is and the other is neither nor harmed.