Dr. Reichler’s Bio 301M  Summer 2008  Quiz 6/25

*These questions were on today's quiz, 6/25, but were from from today’s class.  So now that we have covered this in class, here are the answers.*
8) What is the main difference between the first stage of primary and secondary succession?
In primary succession there are very few resources except for space.  Secondary succession often has many resources present.

9) Why was the rapidity of changes in cancer rates after the Chernobyl accident surprising?
Cancer requires several mutations to occur in the same cell, and that usually takes many years.

10) Are non-humans in the Chernobyl exclusion zone better off since the accident?
Yes and no.  The absence of humans has freed resources for the non-humans, but those resources are contaminated with radiation.