Across
- 3. is a summation of all the organisms of the same group or species, which live in a particular geographical area, and have the capability of interbreeding. In ecology, the population of a certain species in a certain area is estimated using the Lincoln Index
- 4. refers to the size of a population that produces the best results according to chosen end targets.
- 9. equals the CBR – CDR.
- 15. a large increase in crop production in developing countries achieved by the use of fertilizers, pesticides, and high-yield crop varieties.
- 16. hypothesized that unchecked population growth would quickly exceed carrying capacity, leading to overpopulation and social problems (famine/war).
- 19. hypothesized that food production can & will increase to match the needs of the population; improved farming methods & new technologies enable this to happen.
- 20. (CDR) number of deaths occurring among the population of a given geographical area during a given year
- 21. the action of coming to live permanently in a foreign country
Down
- 1. is a graphical illustration that shows the distribution of various age groups in a population (typically that of a country or region of the world), which forms the shape of a pyramid when the population is growing.
- 2. relates the number of children (0-14 years old) and older persons (65 years or over) to the working-age population (15-64 years old)
- 5. based on averages; the number of years that someone is expected to live from a specific starting point; it changes as one grows older, and faces different risks.
- 6. (TFR) the average number of children a woman would have assuming that current age-specific birth rates remain constant throughout her childbearing years.
- 7. the exploitation of biological processes for industrial and other purposes, especially the genetic manipulation of microorganisms for the production of antibiotics, hormones, etc.
- 8. refers to the transition from high birth and death rates to low birth and death rates as a country develops from a pre-industrial to an industrialized economic system.
- 10. of a biological species in an environment is the maximum population size of the species that the environment can sustain indefinitely, given the food, habitat, water, and other necessities available in the environment.
- 11. is a function of the number of individuals compared to the relevant resources, such as the water and essential nutrients they need to survive. It can result from an increase in births, a decline in mortality rates, an increase in immigration, or an unsustainable biome and depletion of resources.
- 12. the act of leaving one's resident country with the intent to settle elsewhere.
- 13. 15-49 years old
- 14. (CBR) the number of live births occurring among the population of a given geographical area during a given year
- 17. To estimate the number of years for a population to double, take the number 70 and divide it by the growth rate of the population.
- 18. having a population lower than is normal or desirable