The internal rate of return of a project is the discount rate at which npv is? (
a. positive (
b. negative (
c. zero (
d. negative minus positive

For 50 points populations within ecosystems can be separated into categories—producers, consumers, and decomposers. these categories represent a. the fossil records of organisms. b. the reproductive methods of organisms. c. the body plans of organisms. d. the functions that organisms serve.