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ECU EHST 2110 EXAM 1 AND 2 QUESTIONS AND ANSWERS
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ECU EHST 2110 EXAM 1 AND 2 QUESTIONS AND ANSWERS
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Name: Score:214 Multiple choice questions
Term 1 of 214
Environmental Resistance
measured difference between biotic potential of a population and the actual observed
rate of growth
caused by eating certain large reef-dwelling fish such as barracuda and red snapper
containing a potent algal toxin
Tolerance levels- maximum quantity of a pesticide residue allowable for raw agricultural
commodity
leaves 30% or more of soil surface covered with previous year's crop residue (tilling only
part of the field)
Term 2 of 214
To what extent does expanding the amount of land under cultivation offer hope for
significantly increasing world food supply? Why?
Clearing for agriculture production
produces good farmland for an increase in production
caused by ingesting large numbers of live organisms
- Promoting of breast feeding of infants
- Administering large doses of vitamin A in infected kids
- Fortifying foods with vitamin A
,Term 3 of 214
In Western America, there are ______ million publicly owned rangelands with ___% unsatisfactory
condition
70 ; 75
Brazil, SA
270; 60
overgrazing
Term 4 of 214
Intoxications
individuals of the same species living together within a given area
Imported by farmers in the SE US to keep algae out of ponds
ingesting preformed bacterial toxins
fields are tilled only in narrow raised rows to be planted; remainder is left with
Term 5 of 214
Entropy
appetite loss, diarrhea, tenderness and discomfort in legs, hemorrhaging, feelings of
paralysis, ulceration of the gums and loss of teeth, sometimes death
- Refers to the # of people within different age categories
- Larger youth percentage where countries have higher birth rates
all energy is moving toward an ever less available and more dispersed state
wealthy eat relatively well in all countries, poor do not
,Term 6 of 214
Global life expectancy is increasing
By 2030, 1⁄4 of the world's population will be >60 yo
Intensive efforts after World War II to improve living standards and ensure national
stability are being nullified by rapid population growth.
less than adequate sanitation and safe drinking water resourses
leading cause of death and disease
Term 7 of 214
Birth Rate
# babies born per 1000 people per year
worse
Loss of federal farm program benefits if they drain more wetlands
overgrazing, loss of shrubs, grasses, soil erosion
Term 8 of 214
Yield ceiling
320 Million
loss of soil due to wind, water transport
disease outbreaks become more likely
no more gains/acre
, Term 9 of 214
Corn yields on farms ________ from 1940- 1985 in US
T - Value
quadrupled
- Urban development
- Erosion
- Desertification
- Salinization
19,000 ; 6
Term 10 of 214
Staphylococcus aureus
GR = (birth rate-death rate) / 10 = GR%
increased demand for higher quality foods such as meats and dairy products
"Roto- Rooter Disease"- bacteria found in pimples, boils, hangnails,
The study of ecological principles that govern the ways in which populations change in
size
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