Question 1

A decrease in the over fishing of herring and perch would have prevented the decimation of the kelp beds along the west coast of the U.S..

Accepted Answer

A) True 
 B)False

Question 2

Scientists have predicted minimum, maximum, and probable temperature increases due to global warming by the year 2060 that will lead to further species extinctions.
  
A. What is the maximum likely increase in temperature by the year 2060?
B. What is the minimum likely increase in temperature by the year 2060?
C. What is the most probable increase in temperature by the year 2060?

Accepted Answer

The answer of Scientists have predicted minimum, maximum, and probable...

Question 3

As the producer biodiversity doubles what will happen to the rate of photosynthesis?

Accepted Answer

A)  It will double. 
B)  It will decrease by 50%. 
C)  It will increase by .1 - .2. 
D)  It will increase by .5 - .8. 
E)  It will decrease by .2 - .4.

Question 4

Which of the following statements applies to an ecosystem with a high level of biodiversity?

Accepted Answer

A)  The ecosystem will have a higher rate of photosynthesis than a comparable ecosystem with a low level of biodiversity. 
B)  Resource partitioning will occur easier in an ecosystem that has a high level of biodiversity. 
C)  The food web will be more complex and will have a greater number of connections within it. 
D)  Areas of high biodiversity are economically more valuable than areas with limited biodiversity. 
E)  All of these apply to an ecosystem with a high level of biodiversity.

Question 5

When the factors causing habitat decline are identified and a procedure is developed to remedy this, it is

Accepted Answer

A)  the edge effect. 
B)  a habitat restoration plan. 
C)  a population viability analysis. 
D)  a gap analysis. 
E)  landscape dynamics.

Question 6

The use of noncultivated fruit, animal skins, fiber, beeswax, and fish are examples of the ______ value of biodiversity.

Accepted Answer

A)  agricultural use 
B)  medicinal use 
C)  consumptive use 
D)  contributions to the biogeochemical cycles

Question 7

As "civilization" spread around the world, several species benefitted greatly from new human-made habitats, including the house fly, the Norwegian rat, and many crop plants. Generally, with expansion of human populations and agriculture,

Accepted Answer

A)  there has been an increase in biological diversity. 
B)  biological diversity has remained the same, with human-associated organisms replacing the few natural species displaced. 
C)  biological diversity has decreased but mainly with the elimination of pests by humans. 
D)  biological diversity is decreasing at an accelerating rate with the elimination of many unstudied species.

Question 8

Approximately what % of the known biodiversity on Earth is composed of plants?

Accepted Answer

A)  16 - 19% 
B)  50 - 55% 
C)  12- 15% 
D)  63 - 67% 
E)  6 - 8%

Question 9

What is the main reason that the field of conservation biology has developed?

Accepted Answer

A)  The current rates of extinction on Earth due to human related factors. 
B)  Humans looking for new methods of obtaining resources from the natural environment. 
C)  The consolidation of multiple fields of science into one in an attempt to be more efficient. 
D)  As a means of monitoring the stability of ecosystems.

Question 10

Which of the following statements concerning the indirect values of biodiversity is NOT correct?

Accepted Answer

A)  Trees take up carbon dioxide and release oxygen when they photosynthesize. 
B)  Forests act as a sponge to soak up water and release it during drier periods. 
C)  If biodiversity cannot maintain the biogeochemical cycles, then technology will have to artificially create those cycles. 
D)  Diverse organisms are critical in breaking down wastes and immobilizing pollutants. 
E)  All of the choices are correct.

Exam 47: Conservation of Biodiversity