(06.04 HC) In one fishing ground off the coast of England, h…

(06.04 HC) In one fishing ground off the coast of England, herring were fished so extensively that their numbers dropped 30-fold in 15 years. A fishing ban allowed herring numbers to rebound to the extent that they are now a species of least concern. For a species that is declining, like the herring, why might a scientists want to establish a “no-fishing” zone (like a marine protected area) as a tool for dealing with overfishing? Explain two benefits and list at least one potential limitation of this type of intervention. (5 points)

(04.03 MC) The diagram below represents a marine food web an…

(04.03 MC) The diagram below represents a marine food web and a process that can harm the human population. Each circle represents an organism and the smaller dots inside them represent a toxic substance. What is being represented and how does it harm the population? (3 points) © 2016 CC-BY-SA