Question 18 (2 points)
The ability of scientists to understand the natural relationships between organisms
and their environments depends upon the
development of bioengineered organisms
value of the natural resources in the region
availability of undisturbed regions in the world
the institutional value of the organisms in the ecosystem
Question 19 (2 points)
In preparation for the construction of a new, large subdivision, over 500 acres of
torests are cleared. In this cleared region, we will expect that
more species of birds and insects will inhabit the region
a drainage system will be built to limit erosion
the levels of carbon dioxide in the air will decline
Question 20 (2 points)
Which of the following situations is most likely to have the lowest infiltration-runoff
ratio?
a beach
a grassland
a paved parking lot
mowed soccer field

Question 18

1. Development of bioengineered organisms
2. Value of the natural resources in the region
3. Availability of undisturbed regions in the world
4. The institutional value of the organisms in the ecosystem

• The development of bioengineered organisms may help in understanding certain aspects but does not directly relate to natural relationships.
• The value of natural resources is more about economic aspects rather than ecological understanding.
• The availability of undisturbed regions is crucial for studying ecosystems in their natural state, which can provide insights into natural relationships.
• The institutional value of organisms may pertain to conservation efforts but does not directly influence understanding.

Question 19

1. More species of birds and insects will inhabit the region
2. A drainage system will be built to limit erosion
3. The levels of carbon dioxide in the air will decline

• Clearing forests typically leads to habitat loss, which would likely result in fewer species of birds and insects, not more.
• A drainage system may be built, but this is a response to the clearing rather than a natural outcome.
• Deforestation generally increases carbon dioxide levels in the atmosphere due to the loss of trees that absorb CO2.

Question 20

1. A beach
2. A grassland
3. A paved parking lot
4. Mowed soccer field

• A beach typically has high infiltration due to sand, leading to a higher infiltration-runoff ratio.
• Grasslands also have good infiltration due to vegetation and soil structure.
• A paved parking lot has very low infiltration because the surface is impermeable, leading to high runoff.
• A mowed soccer field has some vegetation, allowing for moderate infiltration.

Summary of Answers

• Question 18: Availability of undisturbed regions in the world
• Question 19: A drainage system will be built to limit erosion
• Question 20: A paved parking lot