Question 40 of 60 1.667 Points
You are working for an aid organization arranging food shipments to Bangladesh. The population of Bangladesh is 142 million people. The birth rate is 30 per thousand per year and the death rate is 9 per thousand per year. The fertility rate is 3.3 children per woman. Food is scarce, many people are malnourished, the average person receiving eighty percent of required calories. If your target is to ship 100 kg of grain per person that is added to the population in excess of those who die, at the target population expected one year from now, how many kg should you arrange to ship, ignoring immigration and emigration?
A. 400 million kg.
B. 300 million kg.
C. 200 million kg.
D. 100 million kg.
E. 500 million kg.
Question 42 of 60 1.667 Points
Alonso is studying a population of rare orchids and he is concerned about factors that may limit orchid numbers. Which of the following would most likely operate as a density-dependent factor?
A. Drought.
B. Predation by snails.
C. Air pollution.
D. Heavy snowfall.
E. Flooding.
Question 43 of 60 1.667 Points
If global warming of a North American deciduous forest results in a decrease of rainfall from 100 cm annually to 35 cm annually, patches of what kind of ecosystem may begin to replace the forest?
A. Alpine tundra.
B. Taiga.
C. Arctic tundra.
D. Grassland.
E. Desert.
Question 44 of 60 1.667 Points
If you were a travel agent with clients who wanted an ecotour to see bison and prairies dogs, where would you send your clients?
A. Arctic tundra.
B. Desert.
C. Taiga.
D. Grassland.
E. Alpine tundra.
Question 45 of 60 1.667 Points
If you wished to evaluate global exploitation of coniferous trees, which biome would you focus on?
A. Tundra.
B. Savanna.
C. Taiga.
D. Temperate deciduous forest.
E. Tropical rain forest.
Question 46 of 60 1.667 Points
Brenda is studying burrowing animal distribution. Which ecosystem would be least likely to support species that burrow deep into the ground?
A. Savanna.
B. Grassland.
C. Desert.
D. Arctic tundra.
E. Alpine tundra.
Question 47 of 60 1.667 Points
Nuclear energy is attractive because the yield from uranium is about 1000 times that of coal per unit weight. What is a significant drawback?
A. Locating uranium.
B. Greenhouse gases.
C. Drilling.
D. Waste disposal.
E. Methane production.
Question 48 of 60 1.667 Points
You have a government position developing regulations to minimize global warming. Which of the following would provide the greatest contribution to global warming?
A. Carbon dioxide.
B. Methane.
C. Thermal pollution.
D. Nitrogen dioxide.
E. Sulfur oxide.
Question 49 of 60 1.667 Points
Oprah is a biologist employed to conserve the Vancouver marmot, a rare Canadian mammal whose population size has shrunk to less than 100 animals. What risk should she be concerned about that is common to most such small populations?
A. Flooding.
B. Predation.
C. Inadequate nest sites.
D. Inbreeding.
E. Inadequate food.
Question 50 of 60 1.667 Points
Dirk is a politician who is trying to understand the greenhouse effect. Which of the following explanations is most accurate?
A. Ozone is generated by automobile pollution.
B. Atmospheric gases block heat radiation from the earth.
C. CFCs produce holes in the ozone layer.
D. Global warming results in melting of glaciers.
E. Tropical rain forest destruction mimics the destruction of a greenhouse.
Question 51 of 60 1.667 Points
Which of the following factors are density-dependent factors that regulate population growth?
A. food
B. disease
C. stress
D. parasitism
E. all of the above
Question 52 of 60 1.667 Points
Which of the following is a density independent environmental condition?
A. competition for a food source
B. a tornado
C. predation
D. parasitism
Question 53 of 60 1.667 Points
A graph of exponential population growth looks similar to the letter:
A. J
B. S
C. Z
D. U
E. L
Question 54 of 60 1.667 Points
A sphygmomanometer:
A. Measures blood pressure
B. When inflated, can restrict blood flow to the brachial artery
C. Is best used in conjunction with a stethoscope
D. All of the choices listed
Question 55 of 60 1.667 Points
Diastolic pressure is measured:
A. none of the choices listed
B. by lightly tapping the arm
C. when blood flow just returns to normal in the artery
D. as soon as the cuff is completely tightened
Question 56 of 60 1.667 Points
The meaning of the term “amphibia”, for which the Class Amphibia is named, is best described by which of the following:
A. “aquatic eggs” since amphibians lay eggs in water
B. “double skin” since amphibian gills are lost and adult frogs have lungs
C. “aquatic gills” since amphibians first utilize gills
D. “double life” since amphibians spend part of their life cycle in water and part on land
Question 57 of 60 1.667 Points
The tympanic membranes of a frog are located on the head and are used to collect and transmit:
A. infrared radiation
B. echolocation
C. sound waves
D. electromagnetic waves
Question 58 of 60 1.667 Points
An oscilloscope:
A. Provides stimulus to a tested muscle
B. Adds weight (load) to a tested muscle
C. Measures a twitch response of a tested muscle
D. A and C
E. all of the above
Question 60 of 60 1.667 Points
In the Muscle Stimulation lab, electrical stimulation was applied to the muscles and was measured in volts.
True
False
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