14. Which of these is a population density-independent regulating factor?
a. Competition
b. Predation
c. Size of population
d. Weather
e. Resource availability
15. Producers are _________.
a. Autotrophs
b. Herbivores
c. Omnivores
d. Carnivores
16. If biological magnification occurs, the ___ will have the highest levels of toxins in their systems.
a. producers
b. herbivores
c. primary carnivores