EHST 2110 Test 1 Part 1 Questions and Answers 100% Correct
7 views 0 purchase
Course
EHST 2110
Institution
EHST 2110
EHST 2110 Test 1 Part 1 Questions and Answers 100% CorrectEHST 2110 Test 1 Part 1 Questions and Answers 100% CorrectEHST 2110 Test 1 Part 1 Questions and Answers 100% CorrectEHST 2110 Test 1 Part 1 Questions and Answers 100% Correct
Population: - ANSWER - Individuals of the same species living tog...
EHST 2110 Test 1 Part 1 Questions and
Answers 100% Correct
Population: - ANSWER - Individuals of the same species living together within a given area
Community: - ANSWER - Different organisms are not randomly scattered, but live in together in
an orderly manner; changes in #'s of one species within a community can have major
consequences to the whole community
Ecosystems: - ANSWER - Functional units of nature in which living organisms interact with each
other and with the non-living components of their environment to process energy and cycle
nutrients.
Population dynamics: - ANSWER - The study of ecological principles that govern the ways in
which populations change in size
Characteristics unique to a given population: - ANSWER - Birth & death rates, age structure,
spatial distribution
Biotic Potential: - ANSWER - Maximum achievable growth rate with unlimited space in the
absence of limiting factors (disease, predation, food supply)
Environmental Resistance: - ANSWER - Measured difference between biotic potential of a
population and the actual observed rate of growth
Age Structure: - ANSWER - Refers to the # of people within different age categories.
Economically productive: - ANSWER - Economic progress in developing countries is burdened
by the # of dependents ( < 15 yo) who are not
More retired people creates: - ANSWER - Greater economic pressure on the working population
to support "safety net" social security systems
, Lag Phase S-Curve: - ANSWER - Slow growth
Exponential Growth Phase S-Curve: - ANSWER - Dramatic increase in population
Steady-State Equilibrium (or carrying capacity) S-Curve: - ANSWER - birth and death rate in
balance - upper asymptote of curve. Biotic potential of population and environmental resistance
in balance # birhts = # deaths
Lag phase J-curve: - ANSWER - Slow growth to start
Exponential Growth Phase J-curve: - ANSWER - Population increases at rapid rates up to or
above the carrying capacity, environmental resistance becomes effective only at last moment
J-Curve: - ANSWER - Frequently leads to population crashes
Homeostatic Controls: - ANSWER - Self-regulating factors (behavioral, physiological, & social
responses) that are important for controlling population size. Populations have optimum sizes, if
exceeded then stress related responses become evident. Possibly linked to hormonal changes
in response to crowding induced stress.
Thomas Malthus (1766-1834): - ANSWER - Population, when unchecked, increases by a
geometric ratio (2,4,8,16..) while subsistence increases by an arithmetic ration (1,2,3,4..).
Resource limits cause bouts of famine, war, and disease, leading to majority of world's
population with marginal standard of living.
Doubling Time: - ANSWER - Period of time in which a population doubles in size- good measure
of growth.
Human population "surges" seen: - ANSWER - 1) 600,000 yrs ago (development of culture)
2) 8000 BC (agricultural revolution)
3) AD 1800 (industrial/medical/scientific revolution)
Total Fertility Rate: - ANSWER - Average # children per mother during reproductive lifetime
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller NursingTutor1. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
