Test Questions Unit 5 (Chapter 8) Flashcards
Recently, scientists reported finding mercury in 2,700 fish sampled from 12 different U.S states. All of the following are solutions to reducing mercury levels that organisms are exposed to EXCEPT:
A.) Increasing waste incineration practices to reduce landfill use
B.) Removal of Hg (Mercury) from coal prior to burning in electrical power plants
C.) Conversion of coal to liquid or gaseous fuel sources
D.) Utilizing more renewable energy sources such as wind and solar for electrical needs
E.) Recycling mercury-containing batteries and CFLs
A.) Increasing waste incineration practices to reduce landfill use
Which of the following respiratory diseases was a rapidly spreading epidemic in China before it was successfully contained by 2003?: A.) West Nile B.) Malaria C.) Swine Flu D.) SARS E.) HIV
D.) SARS
Which of the following is still being used in the U.S. to control pest populations?: A.) Dieldrin B.) DDT C.) Atrazine D.) Chlordane E.) Aldrin
C.) Atrazine
The theory of island biogeography, which identifies factors that regulate species richness on islands was developed by what biologist
E.O. Wilson
What international agreement phases out 12 organic, persistent pollutants known as the dirty dozen?
Persistent Organic Pollutants Treaty
liver disease that develops due to long time use of alcohol and drugs would be an example of
a chronic effect
ecologists have been studying population in tropical regions to determine the effects of DDT on aquatic systems. Which population would you expect to show the most effects
predatory birds like pelicans
name a consumer product that would most likely increase your exposure to bisphenol A (BPA)
plastic food containers and water bottles
scientists determined that the LD50 for a particular chemical toxin was a dosage level of 125 milligrams per kilogram of body mass for a test population of rats. assuming that the toxic effect observed in rats is the same for similar animals of larger size, what dosage level would be needed to kill 50% of the population of mammals who typically have a mass of 20kg?
.125g/1kg = xg/20kg
Cross multiply.
2.5 g
name an example of a non transmissible disease that is a leading killer worldwide and in the US
cardiovascular disease
name an immediate solution to reducing infectious disease seen in developing countries
sanitation practices to provide clean drinking water
name an animal the is not very vulnerable to biomagnification
moose
name a diseases is not directly transmitted from human to human
malaria
name the rule of how toxic a chemical is based on LD50
the smaller the LD50, the more toxic it is
in general, what percentage of energy is transferred from one trophic level to the next
10%
