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WorksheetsPopulation and Demographic Quiz
Total questions: 120
Worksheet time: 1hrs 15mins
Which of the following best defines a population?
All organisms in an ecosystem
Individuals of the same species living together in a given area
Birth and death rates combined
Communities interacting with their environment
A community refers to:
Individuals of one species in a given area
Randomly scattered organisms
Different organisms living together in an orderly manner
All non-living parts of an ecosystem
The maximum growth rate of a population under unlimited conditions is called:
Carrying capacity
Environmental resistance
Biotic potential
Growth rate percentage
Environmental resistance includes factors such as:
Disease, predation, and food supply
Age structure only
Birth rate alone
Industrialization
Which growth curve levels off at carrying capacity?
S-curve (sigmoidal)
J-curve (exponential)
Linear growth
Logistic decline
A population crash is most likely after:
Balanced carrying capacity
J-curve growth that overshoots limits
Fertility rates fall
Demographic transition
Homeostatic controls include:
Behavioral and physiological responses to overcrowding
Unlimited reproduction
Fertility always increasing
None of the above
Which clergyman and economist predicted that unchecked population growth would lead to famine, war, and disease?
Charles Darwin
Thomas Malthus
Aldo Leopold
Rachel Carson
Which historical event decreased Europe’s population by ~25% in two years?
The Industrial Revolution
The Irish Potato Famine
The Bubonic Plague
World War II
The formula for growth rate (%) is:
(Birth rate + Death rate) ÷ 10
(Birth rate – Death rate) ÷ 10
Birth rate × Death rate ÷ 100
Death rate – Birth rate
A country with a birth rate of 8 per 1,000 and a death rate of 11 per 1,000 has a growth rate of:
–0.3%
0.3%
3%
–3%
Which of the following typically increases growth rate?
War
Famine
Improved sanitation and medicine
Pollution
Demographic transition is defined as:
Rising fertility rates during industrialization
Falling birth and death rates after industrialization
Migration from rural to urban areas
Population crashes
Age structure refers to:
Fertility rates of women
Life expectancy
Distribution of population by age categories
Birth and death rates per year
Developing countries typically have what percentage of their population under 15?
10%
20%
40%
60%
A population pyramid with a wide base and narrow top usually represents:
A developed nation
A declining population
A developing nation with high birth rates
An aging society
By 2030, approximately what fraction of the world’s population will be over 60?
1/10
1/5
1/4
1/3
Which of the following is a major public health concern in urbanizing areas?
Better quality of life for migrants
Poor sanitation and lack of safe drinking water
Lower disease risk
Unlimited food supply
Which family planning factor increases maternal and infant risk?
First or second birth
Short birth intervals (<2 years)
Waiting until age 25–30
Having only two children
For long-term stabilization of population growth, developing nations require:
Contraceptive access only
Broad-based social and economic changes
Larger families
Less education for women
Ecosystems must be large (e.g., forests, oceans) to be considered ecosystems.
(a)
J-shaped (exponential) curves often result in population crashes.
(a)
Carrying capacity is the maximum number of individuals an environment can sustain.
(a)
Population dynamics applies only to humans.
(a)
Stress from overcrowding can cause reduced reproduction and increased mortality.
(a)
The Industrial Revolution led to lower death rates and higher birth rates.
(a)
Age structure has little effect on economic development.
(a)
Global life expectancy is rising, contributing to global graying.
(a)
Urbanization always improves living conditions in developing nations.
(a)
Short birthing intervals increase infant mortality risks.
(a)
Which of the following are producers in a food chain?
Cows and Rabbits
Snakes
Hawks
Green plants and Algae
Which organisms recycle detritus back into the soil?
Consumers
Decomposers
Tertiary Predators
Carnivores
In an ecological pyramid, energy:
Increases at higher trophic levels
Remains the same at all trophic levels
Decreases with each energy transfer
Moves without loss
The first law of thermodynamics states:
Energy can be created and destroyed
Energy cannot be created or destroyed, only transformed
Energy is always lost in transfers
Organisms create their own energy
Which region accounts for 97% of global population growth?
Europe
North America
Asia, Africa, Latin America
Australia
The second law of thermodynamics states:
Energy efficiency increases with each transfer
All energy is moving toward a less usable, dispersed state (entropy)
No energy is lost in a food chain
Producers recycle all energy back into the system
Higher incomes after WWII led to:
Less demand for meat
Increased demand for higher-quality foods like dairy and meat
Stable demand for grain
Reduced food demand
Approximately how many pounds of grain are required to produce 1 lb of beef?
2 lbs
4 lbs
5 lbs
7 lbs
Plant-based meat alternatives can reduce land use requirements by approximately:
10%
25%
50%
76%
The FAO defines hunger as:
Food intake below 2.0 BMR
Food intake below 1.2 BMR per day
Lack of vitamins
Lack of protein only
Roughly how many children die each day from malnutrition or related causes?
740
7,400
74,000
740,000
Poverty as a cause of hunger is best explained as:
Global food production is insufficient
Poor individuals lack purchasing power to buy available food
Wealthy countries hoard all food supplies
Only developing countries face food shortages
Protein-Energy Malnutrition (PEM) is most strongly associated with:
Vitamin deficiency only
Chronic lack of calories and protein
Overconsumption of junk food
High-fat diets
Kwashiorkor results from:
Iron deficiency
Vitamin C deficiency
Protein deficiency in starchy diets
Calorie deprivation alone
Marasmus is most common in:
Elderly adults
Infants < 1 year old
Pregnant women
Adolescents
Vitamin A deficiency is a major cause of:
Childhood Blindness
Scurvy
Anemia
Kwashiorkor
Anemia is most often caused by a deficiency of:
Calcium
Vitamin D
Iron
Iodine
Which is the most promising method for combating iron deficiency globally?
Only iron supplements
Fortifying food staples (e.g., double-fortified salt)
Encouraging vegetarian diets
Banning tea and coffee consumption
Which of the following is a major problem with overfishing?
“Fishing down the food web” as large predatory fish decline
Increase in biodiversity
Unlimited growth of fish stocks
Fish becoming resistant to capture
Which is a potential benefit of GMOs in agriculture?
Increased pest resistance and higher yields
Guaranteed reduction of food demand
Removal of need for fertilizers
Elimination of malnutrition globally
Energy transfer in ecosystems is 100% efficient.
(a)
Meat production requires more energy and grain than plant-based diets.
(a)
Women are often at greater risk of malnutrition than men.
(a)
Global food production is insufficient to meet the world’s caloric needs.
(a)
Vitamin A deficiency can weaken immune systems by impairing white blood cell function.
(a)
Scurvy is caused by a deficiency of Vitamin C.
(a)
Iron deficiency anemia affects fewer than 1 billion people globally.
(a)
Aquaculture is a sustainable solution without ecological challenges.
(a)
Eating lower on the food chain could feed more people globally.
(a)
Loss of farmland due to erosion, salinization, and urbanization reduces food production capacity.
(a)
Food adulteration is best defined as:
Accidental contamination of food with dirt or waste
Addition of inferior or cheaper material to stretch supplies and increase profits
Intentional fortification of foods with vitamins
Use of natural additives in food
Which of the following was not a common form of food adulteration in the 19th century?
Black pepper mixed with floor sweepings
Bread whitened with alum
Milk pasteurization
Candies tinted with lead salts
The Pure Food and Drugs Act of 1906 was designed primarily to:
Ban all food coloring
Protect consumers from adulteration, mislabeling, and harmful ingredients
Regulate the use of pesticides in crops
Require all foods to be organic
Substances accidentally incorporated into foods are called:
Additives
Contaminates
Preservatives
Adulterants
Which of the following is an example of a trade-off with contaminants?
Using pesticides reduces insect parts in food but increases pesticide residues
Adding vitamins reduces shelf life
Packaging reduces safety but improves taste
More refrigeration increases bacterial contamination
Approximately what percentage of U.S. feedlot cattle are treated with hormone implants?
25%
50%
75%
90%
rBGH (recombinant bovine growth hormone) is primarily used to:
Increase meat tenderness
Boost milk production in dairy cows
Prevent foot-and-mouth disease
Reduce pesticide use
Which regions prohibit rBGH use in dairy cattle?
United States only
Canada, Europe, Japan, Australia, New Zealand
Africa and South America
China and India
The 1996 Food Quality Protection Act required the EPA to consider:
Only adult dietary patterns
The unique vulnerability of children when setting pesticide tolerance levels
Banning all pesticides
Animal welfare in pesticide application
Which farming method typically costs more for consumers?
Conventional
Organic
Hydroponic
Industrial
A potential downside of organic farming is:
Higher vitamin content in foods
Increased risk of foodborne disease outbreaks
Lack of consumer demand
No difference in cost from conventional
Substances intentionally added to modify taste, color, or shelf life are:
Contaminates
Food additives
Hormones
Pollutants
The Delaney Clause prohibits:
Carcinogenic food additives
Use of natural flavorings
Pesticide application on fruits
Organic certification
The GRAS list refers to substances:
Generally Recognized As Safe
Genetically Researched and Safe
Government Regulated Additive Substances
Generally Removed After Safety-testing
Which natural toxin is found in water hemlock?
Ricin
Ergotamine
Cicutoxin
Aflatoxin
Castor beans contain:
Safrole
Ricin
Aflatoxin
Cicutoxin
Aflatoxin, a carcinogenic mold toxin, is commonly associated with:
Wheat and rye
Corn and peanuts (in humid regions)
Fish and shellfish
Dairy products
Ciguatera fish poisoning is caused by:
Poor refrigeration of fish
Dinoflagellate toxins in large reef fish (e.g., barracuda, snapper)
Viral contamination of shellfish
Worm infections in raw fish
Which bacterial illness is commonly linked to undercooked poultry?
Salmonellosis
Listeriosis
Campylobacter jejuni
E. coli O157:H7
The “danger zone” for rapid bacterial growth in food is:
0–32°F
32–41°F
41–140°F
160–200°F
Adulteration always occurs accidentally during food processing.
(a)
Europe banned hormone-treated beef due to health concerns.
(a)
Children are more vulnerable than adults to pesticide residues due to their body size and diet.
(a)
Organic foods are always safer and free from foodborne pathogens.
(a)
More than 3,000 food additives are currently in use.
(a)
The Delaney Clause prohibits use of any substance shown to cause cancer in animals or humans.
(a)
Ergot poisoning (ergotism) historically caused hallucinations and painful muscle contractions.
(a)
Vibrio vulnificus infections are most often linked to eating raw oysters.
(a)
Staphylococcus aureus food poisoning can occur within 2–4 hours of ingestion.
(a)
Preventing foodborne illness involves time/temperature control, cross-contamination prevention, hygiene, and sanitation.
(a)
Which factor is the most significant cause of soil degradation worldwide?
Deforestation
Desertification
Overgrazing
Wetland loss
About what percentage of Earth’s land is considered rangeland?
10%
25%
40%
60%
How long does it typically take to form one inch of fertile topsoil?
10–20 years
50–100 years
200–1,000+ years
Less than 5 years
The Dust Bowl of the 1930s was a result of:
Heavy rainfall and flooding
Poor soil conservation and drought
Volcanic eruptions
Earthquakes
Which law offered incentives to farmers to take erodible land out of production?
Food Quality Protection Act
Food Security Act of 1985
Swampbuster Provision of 1985
Endangered Species Act
Permanent reduction of tree crown cover to less than 10% of original extent is:
Overharvesting
Deforestation
Desertification
Wetland loss
The largest single cause of deforestation globally is:
Road construction
Clearing land for agriculture
Logging for furniture
Mining
Which crop is a significant driver of deforestation in Brazil besides cattle ranching?
Wheat
Rice
Soybeans
Cotton
Approximately what percentage of global wood cut is used for fuel in poor countries?
10%
25%
50%
75%
Which environmental issue directly results from vegetation removal and soil nutrient loss in semi-arid regions?
Desertification
Eutrophication
Ocean acidification
Deforestation
Which is NOT one of the three requirements for land to be classified as a wetland?
Hydric soils
Hydrophytic vegetation
Wetland hydrology
Average rainfall > 50 inches per year
The main anthropogenic cause of wetland loss is:
Coastal flooding
Road construction
Drainage for agriculture
Pine plantations
Wetlands provide all of the following services EXCEPT:
Flood control
Water filtration
Habitat and nurseries
Industrial fuel extraction
The Convention on International Trade in Endangered Species (CITES) regulates:
Carbon emissions
Trade of endangered plants and animals
Urban sprawl
Wetland restoration
Which invasive species devastated bird populations in Guam?
Zebra mussels
Brown tree snake
Kudzu vine
sian longhorn beetle
Which U.S. state has the largest acreage of wetlands?
Florida
Louisiana
Texas
Alaska
The greatest threat to biodiversity worldwide is:
Invasive species
Habitat destruction
Pollution
Overhunting
Areas with exceptionally high biodiversity and high risk of extinction are known as:
Conservation reserves
Hot spots
Buffer zones
Tolerance zones
The Endangered Species Act (1973) prohibits:
Collecting endangered species
Killing or harassing endangered species
Capturing threatened species
All of the above
Which compromise allows development if habitat is protected or offset elsewhere?
Conservation Reserve Program
Habitat Conservation Planning (HCP)
Wetlands Restoration Act
Global Biodiversity Convention
About 90 species of animals in the U.S. are threatened due to overgrazing.
(a)
Soil erosion leads to loss of fertility and potential crop yield reduction.
(a)
Commercial lumbering is the largest single cause of deforestation globally.
(a)
Roughly 80% of wetland loss is due to drainage for agriculture.
(a)
Wetland regulations in the U.S. completely ban draining and filling.
(a)
Biological diversity contributes to ecological stability and potential human medicines.
(a)
Hawaii has the greatest number of endangered native species in the U.S.
(a)
Climate change can fragment habitats and force species to migrate or compete.
(a)
Only about 4% of Earth’s land is formally protected in reserves or parks.
(a)
The Endangered Species Act is fully funded and without opposition.
(a)
