last_frontier.indd “PCBs in the Last Frontier” by Michael Tessmer Page 3 Part III—Signifi cant Diff erence? Recent observations of pcb levels in arctic lakes have shown that the levels of pcbs are not...

1 answer below »
two questions


last_frontier.indd “PCBs in the Last Frontier” by Michael Tessmer Page 3 Part III—Signifi cant Diff erence? Recent observations of pcb levels in arctic lakes have shown that the levels of pcbs are not the same in all lakes that are near each other and at the same altitude. In fact, lakes at the terminus (i.e., the start) of river systems had higher pcb levels than completely isolated lakes that were close by. Questions . What possible “explanatory story” might explain the observation described above? (Hint: Th ink of species that leave a lake but return later in life.) . How would you test your hypothesis made above?
lastfrontier-p2huqz4s.pdf
Answered Same DayFeb 13, 2021

Answer To: last_frontier.indd “PCBs in the Last Frontier” by Michael Tessmer Page 3 Part III—Signifi cant Diff...

Rajeswari answered on Feb 14 2021
141 Votes
Significant difference
Questions .
What possible “explanatory story” might explain the observation described above? (Hint: Th ink of species that leave a lake but return later in life.)
It is observed that PCB concentrations in the open waters are normally between 100 and 3 00 pg L–1.
In regional atmosphere they are supposed to be almost in equilibrium
Since PCB’s are hydrobolic they are present in the air and likely to enter the great lakes.
Polychlorinated biphenyls (PCBs) are man made chemicals and have no smell or taste. Colour is white to yellow. But higher levels of PCBs are harmful to health and...
SOLUTION.PDF
SOLUTION.PDF

Answer To This Question Is Available To Download

Related Questions & Answers

More Questions »

Submit New Assignment

Copy and Paste Your Assignment Here
Have files?