Unit 4 Test Flashcards
Exponential growth rates when graphed produce what shape curve?
J
The number or biomass of a species that can be supported in a certain area without depleting resources is called?
carrying capacity (K)
Organisms such as flies that have a high reproductive rate to overcome high mortality rates are?
r-selected species
Name a biotic factor.
disease causing bacteria
Interspecific interactions occur
between species
What is the growth rate formula
(B+I)-(D+E)
Name a country that is most likely to experience negative population growth.
Lithuania (Eastern Europe)
Stress related diseases in a population are?
Density dependant
The minimum viable population size is the population size required to prevent…
Species extinction
Every second, ___ children are born and __ adults die.
5 and 2
Who argued that population growth is the ultimate cause of many of the world’s social and environmental problems?
Thomas Malthus
If the annual growth rate of the US population is 1% and it continues to grow at this rate for one year, about how many people would be added
3 x 10^6
What area of the world is experiencing the highest fertility rate?
Africa
What area of the world has the largest percentage of the global population?
Asia
What area of the world consumes the largest amount of global resources per capita?
North America
In the year 2010, a country had a population of 10 million people, a birth rate of 7.2 and a death rate of 2.2. If the birth and death rates remain constant, the population will be close to 40 million in what year?
Rule of 70 says: 70 over (7.2-2.2) = 14 years to double
2010 = 10 million
2024 = 20 million
2038 = 40 million
When compared to most developed countries, most developing countries have higher what?
Infant mortality rates
Name a density independent population control factor.
Habitat destruction
Of the following, the factor most directly responsible for the growth of the human population in the past 100 years is?
Improved medical care and sanitation
Replacement level fertility in a developed nation is likely to be nearest?
2.1
Rachel Carson is to DDT as…
Roland and Molina are to CFC’s
Name an animal in which the extinction of would be devastating to life on Earth.
The honeybee
Currently, the country with the highest population is ____ and the second highest is ____.
China and India
The TFR is the number of children born…
To one woman in her lifetime
In the last 100 years, the average life expectancy of a world citizen has increased by over ____ years.
30
In Africa, ____ has reduced the population by more that 25%.
AIDS
The size and isolation of an island will have the greatest effect on its?
Species diversity
In general, what percentage of energy is transferred from one trophic level to the next?
10%
What is not an ecosystem service provided by forests?
Road construction
In what year did the world population first reached 1 billion people?
1800
As a developing country goes high birth and death rates to low birth and death rates, the pattern is known as what?
Demographic transition
