click below
click below
Normal Size Small Size show me how
Biology Ch. 4-Lytle
Lytle Biology Chapter 4 Vocabulary
Question | Answer |
---|---|
age structure | in any population, the number of individuals in their pre-reproductive,reproductive, and post-reproductive years |
carrying capacity | largest number of individuals in a species that an environment can support long-term |
demographic transition | population change from high birth rates to low birth rates and death rates |
demography | study of human populations based on size, movement,distributions, and birth and death rates |
density-dependent factor | environmental factor,such as predation,disease,and competition,that depends on the number of members in a population per unit area |
density-independent factor | environmental factor,such as storms and extreme heat or cold, that affects populations regardless of their density |
dispersion | arrangement of a population in its environment |
emigration | movement of individuals away from a population |
immigration | movement of individuals into a population |
population density | number of organisms per unit of living area |
population growth rate | how fast a specific population grows |
zero population growth | occurs when the birthrate equals the death rate |