SSN__________________________

BY380 Fall, 1998

MOCK EXAM

Total 22 points

PART I. Multiple Choice. Please choose the letter that best answers each question. Record your answers to Part I only on the green answer sheet. (2 points each)

1 Increased CO2 levels produced by fossil fuel combustion cause global warming because:

  1. CO2 molecules in the atmosphere absorb the long-wave radiation emitted by the earth.
  2. CO2 molecules become deposited on the surface of the earth causing the earth’s surface temperature to increase.
  3. extra CO2 molecules in the atmosphere increase the frequency of lightning strikes which cause more fires.
  1. more CO2 molecules in the atmosphere causes an increase in the rate of photosynthesis which causes higher rates of evapotranspiration.
  2. all of the above.

2. The total amount of annual solar energy that reaches the earth is:

  1. influenced by soil moisture.

B equal at all latitudes.

C is greater at polar areas then at equatorial areas.

D. is greater at equatorial areas then at polar areas.

E. is greater during May-August at all latitudes.

3. A plant that opens its stomates at night for CO2 exchange is called:

A. long-night

B. C4

C. C3

D. CAM

E. Short-day

The northern boundary of the distribution of Rubia peregrina (wild madder- a plant) coincides with the the January 4.5° isotherm. It has been suggested that this occurs because temperatures < 4.5° retard the growth of new shoots. In Questions 4-6, you will describe a laboratory experiment you design to test this hypothesis.

4. What is the null hypothesis (2 points)?

5. Briefly, describe your experimental treatment? (2 points)

 

6. What will be your control? (2 points)

 

 

7. You have joined the Biosphere II project, meaning that you will live for several years in an artificial ecosystem inside a plastic bubble. You will obtain a substantial share of your protein from eating meat. Since the amount of radiant energy flowing into the biosphere limits you (and you are anxious to have some sunlight available to fuel solar cells so you can watch TV to while away the time), you want to make the best possible use of available energy. Would you choose a diet of meat and potatoes or grains and veggies? (5 pts)

__________________

Why?

 

 

 

8. Allometric equations are of the form Y = aXb. Biologists prefer to plot these allometric relationships as linear functions. Convert this allometric equation to its linear form. Explain why your new function is a linear function (5 pts).

 

BACK TO CLASS PAGE