The diagram shows a food chain. Which term best describes the green plant in the food chain?
A. Predator
B. Competitor
C. Consumer
D. Producer

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Explain why biological control methods are generally environmentally superior to chemical pest control methods.