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SLCC ENSC 1000 EXAM #2 QUESTIONS WITH CORRECT ANSWERS
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SLCC ENSC 1000 EXAM #2 QUESTIONS WITH CORRECT ANSWERS
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SLCC ENSC 1000 EXAM #2 QUESTIONSWITH CORRECT ANSWERS
Thomas Malthus - Answer-wroteAn Essay on the Principle of Populationin which he
showed that human populations increase exponentially.
Karl Marx - Answer-view, that population growth resulted from poverty, resource
depletion, pollution, and other social ills
Malthus vs. Marx - Answer-Malthus - poverty causes overpopulation
Marx - overpopulation causes poverty
Demography - Answer-encompasses vital statistics about people such as births, deaths,
distribution, and population size
Organisms considered in imminent danger of extinction are called? - Answer-
endangered
The number of children born to an average woman in a population during her life? -
Answer-Total Fertility Rate
These are chemicals used to kill biological pests? - Answer-pesticides
Crude Birth Rate - Answer-Number of births in a year per thousand. (Not adjusted for
population characteristics such as number of women of childbearing age.)
Total Fertility Rate - Answer-number of children born to an average woman in a
population during her life
Zero Population Growth - Answer-Occurs when births plus immigration in a population
equal deaths plus emigration. ZPG Is a rate of 2.1 children per couple, not 2.0, because
some people do not have children and some children do not survive to reproductive
age.
Crude Death Rate - Answer-The number of deaths per year per 1,000 people.
Natural Increase - Answer-crude birth rate minus crude death rate
Total growth rate - Answer-includes immigration, emigration, births and deaths.
the primary cause of most population growth in last 300 years. - Answer-Declining
mortality
, Family Planning - Answer-allows couples to determine the number and spacing of their
children
Health - Answer-a state of complete physical, mental, and social well-being (not just the
absence of disease or infirmity)
Disease - Answer-an abnormal change in the body's condition that impairs physical or
psychological function
Disability-adjusted life years (DALYs) - Answer-combine premature deaths and loss of
healthy life resulting from illness or disability
Pathogens - Answer-disease-causing organisms. They include:-Viruses-Bacteria-
Protozoans-Parasitic worms including flukes
Antibiotics - Answer-chemicals that kill or inhibit the growth of bacteria
Toxicology - Answer-the study of poisons and their effects on living systems.
Dangerous chemicals are divided into two broad categories: - Answer-Toxic and Other
Hazards
Toxic chemicals - Answer-known poisons that damage or kill cells/tissues
Other Hazards (chemicals) - Answer-dangerous but not toxic
Ecotoxicology - Answer-deals with the interactions, transformation, fate, and effects of
natural and synthetic chemicals in the biosphere.
Allergens - Answer-substances that activate the immune system
Antigens - Answer-substances that are recognized as foreign by white blood cells and
stimulate the production of specific antibodies
Antibodies - Answer-proteins produced by our bodies that recognize and bind to foreign
cells or chemicals
Immune System Depressants - Answer-pollutants that depress the immune system
instead of activating it.
Endocrine Disrupters - Answer-disrupt normal hormone functions
Neurotoxins - Answer-metabolic poisons that specifically attack nerve cells; most are
extremely toxic and fast acting.
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