bio lecture 20
Terms
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- With the current growth rate of 1.2%, the human global population at 2050 is likely to be over ______ billion
- nine
- The current population size of _______ is currently at 1.1 billion, and it is predicted that the country of ________ is the world’s most populous nation.
- India, China
- The _________ influences the size of a population by affecting the reproductive strategies that are used by the organisms.
- enviornment
- Organisms that live in an environment with unstable resources produce a large number of offspring. This type of reproductive strategy is known as ________.
- r-selection
- Species that use the _________ strategy live in an environment with predictable resources and a low predation rate.
- K-selection
- __________ is a measure of how many individuals an environment can support based on the availability of resources.
- carrying capacity
- Around the year 1 AD, the worlds human population was estimated to be about __________.
- 300 million
- The development of societies based on __________ at about 10,000 years ago was largely responsible for expanding the human population.
- agriculture
- Since the industrial revolution, the large growth in the human population has been sustained by the development and the use of __________ for food production.
- technology
- Pandemic diseases, illiteracy, and sanitation breakdowns are just some of the results of human __________.
- overpopulation
- By 2050, the world population could reach 11 billion, if the global fertility rate remains above _____ children per family
- two
- It has been estimated that the _______ policy has reduced the population of China by as much as 300 to 400 million people
- one child
- Even though _______ has the longest life expectancy in the world, its population is shrinking because of low _________.
- Japan, birth rates
- Although the birth rate in the U.S. is relatively low, the U.S. population has continued to grow because of the addition of _________.
- immigrants
- Even though sub-Saharan African is experiencing an increase in its population, it also has an epidemic of _______, which is have devastating effects on its population.
- AIDS