| Term | Definition |
|---|
| carrying capacity | population size that an environment can sustain |
| density-dependent factor | limited resources whose rates of depletion depend on the density of the population using them |
| density-independent factor | factors, such as climate, that affect the growth of populations, these factors are unnaffected by the density of the populations |
| directional selection | natural selection that causes the frequency of a particular allele to move in one direction |
| dispersion | the pattern of distribution of organisms in a population |
| exponential growth curve | J shaped curve showing the rapid increase in an exponentially gorwing population |
| gene flow | movement of alleles into or out of a population due to the migration of individuals to or from a population |
| genetic drift | random change in allele frequency in a population |
| Hardy-Weinberg principle | principle stating that the frequency of alleles in a population does not change unless evoultionary forces act on the population |
| K-strategist | species characterized by slow maturation, few young, slow population growth, and reproduction late in life |
| logistic model | model of population growth that assumes finite resource levels limit population growth |
| nonrandom mating | mating between individuals of the same phenotype or by those who live nearby |
| normal distribution | bell-shaped curve that results when the values of a trait in a population are plotted against their frequency |
| polygenetic trait | charistic of an organism that is influenced by several genes |
| population | group of individuals that belong to the same species, leave in the same area, and breed with the others in the group |
| population density | in a population, the number of individuals in a given area |
| population model | hypothetical population that attempts to exibihit the characteristics of a real population |
| population size | total number of individuals in a population |
| r-strategist | species characterized by rapid growth, high infertility, short lifespan, and exponential population growth |
| stabilizing selection | type of natural selection in which the average form of the trade is favored and becomes more common |
Combine with other sets
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