Bio9 Fall 2007 Essay Key Exam 2
Due to several instances of cheating on Exam 1, it took me much longer to finish grading.
It’s happened again for Exam 2. When this happens, we all suffer. It’s time-consuming
and unpleasant. For the next exams, if I even see a hint of copying, you will receive a
zero for the entire class.
One critical mistake students make is not realizing the importance of being able to use
your own words to answer questions. When someone asks you about a problem or
solution, will you run to a book and read it to them? More significantly for you, do you
know that passing off others’ exact words and ideas as your own is plagiarism (theft),
punishable by law or in the case of students, expulsion from school? I state this very
clearly in my instructions. Luckily, you are not a class of science majors, and I only will
give you a zero for stolen work. Do yourself a favor and do not copy from fellow
students, the text, the web, or any other source.
1. What is the current population of the world? 1 point
~6.5 -6.64 billion
2. What is its current growth rate?
1.167% currently, and going down with
each year: 1.14% in 2007,
1.25% in 2004. If you gave an older, less precise figure
without citing the year, I did not give credit. If you used the rounded figure “1.2%”, but
did not cite the year, you received half credit. Even a tenth of 1% equals a huge
difference in population growth. Do the calculation…)
3. If a country has a growth rate of 1.7 %, how long will it take for its population to
double? (Show calculation)
rule of 70 =>
70/1.7 = 41 years
4. What spectacular biome (considered a complex zonation) is known as “islands of
biodiversity”? 1 point
5. List the top 3 areas of greatest marine biodiversity. 3 points
Coral reefs, estuaries, deep-sea floor - p. 179.
NOT open ocean. Remember Net Primary Productivity from Unit 1? In
compare “open ocean” with “estuaries”!
And of course, the “zones of the ocean” wouldn’t make sense as an answer to this
6. Name 6 things you and others can do to help sustain terrestrial biodiversity? Be
specific to the issue. 3 points