ENTO 201 - EXAM 1
September 19, 2001 Name: __________________________________
ILLEGIBLE ANSWERS WILL NOT BE GRADED
Read directions and questions carefully. Think before you respond. GOOD LUCK.
FILL-INS (10 pts each question). Fill in the blanks with the appropriate word or words to make the sentence or statement complete. NOTE: Some statements have more than one correct response, you need only supply a correct answer in the context of the course.
HONESTY IS EXPECTED!
What might be two non-ecological approaches (guiding Principles to understanding Conservation biology? 1.__________________________________________________________
2. _____________________________________________________________
In defining a conservation ethic we might say ___________________ is good while ____________________________is bad. Explain what we mean by this last sentence:
2. Joh Muir advocated the _____________________________________ approach to conservation while Gifford Pinchot is credited as the "founding father" of a ________________________________________________. How might one of these two individuals viewed the White Clay Creek watershed?
3. Pick one (1) of these 4 living/extinct/threatened animal populations and relate how they teach us something (Min of three things) about conservation
Great Auk grain beetle macaw starfish pisaster
4. The ultimate source of food energy for living organisms is the ____________________. Organisms have _____________________________ limits to abiotic features of their environment which help comprise a basic requisite of life, namely _______________.
The living organisms live within a (an) _________________________________. Why did I not include reproduction (as some books do) as one of the 4 basic requisites of life?
5. Label x&y axis and point a of this graph. What does it illustrate?
6. A density dependent population regulating factor might be ___________________ which means _________________________________________________________________.
The density of the population will likely fluctuate around the ______________________ for the particular HABITAT or NICHE (CIRCLE CORRECT ANSWER) of the organism. What factors could influence that? (answer in blank immediately above).
7. An island has a population of 20 individuals. Growth rate is 0.4. After one year how large is the population? __________. If the growth rate continues at 0.4 for 3 years is growth rate curve likely to be EXPONENTIAL or SIGMOID or J-SHAPED (CIRCLE ONE). If the island population was larger (220 individuals) what is the dn/dt for this larger population the first year? __________ (Ignore K in your calculations).
8. As we understand modern evolution _______________________ change over time in their PHENOTYPE, GENOTYPE or GENE POOL (CIRCLE ONE). Change is driven due to __________________________ as more individuals are born than ___________
_____________________. Charles Darwin, who initially described evolution, used as evidence _________________________ and ____________________________ but he was unaware of __________________________________________.
9. If not an autotroph, a living organism is a _________________________ or _________
_____________________________. They are tied together in a ___________________ relationship among and between each other. These organisms do not have ___________
___________________ but their ____________________________ do (Answer to blank above). Why is it not feasible to think of the collection of organisms living in one place as a supra-organism?
10. How was a bed quilt used to illustrate the microenvironments of earth (minimum of 3 things)?
11. Distinguish between a KEYSTONE and an ABUNDANT species (minimum of three things) giving an example of each (from the same place).
12. Diagram a sigmoid or logistic curve of population
growth: Label x & y axis and put a z on the curve
where growth rate is maximum. What is reason for
the farthest left part of curve?
13. Community diversity or species richness is determined by _____________________. If a community has a high alpha diversity it means _____________________________. Where might we find high alpha diversity of many different species? _______________. When a species has high genetic diversity we might expect more __________________. This diversity might be due to ______________________ or _____________________.
14. If fossils document the macroevolution of organisms explain an example of modern microevolution?
15. In diagram or words illustrate the relationship (numbers or biomass) of organisms at different tropic levels in a "typical" ecosystem.
Ecosystem used is ______________________
ESSAY (10 Points). Select one of the two choices below (DO ONLY 1) and write an organized 3-4 paragraph response using complete sentences.
A. Explain three ways humans seek to disconnect the connectedness of organisms and the consequences of our actions.
Or
B. Explain the statement: Diversity and variety is important on three levels for a normal, healthy ecosystem.