ORGANISMS AND THEIR ENVIRONMENT
  • Biotic potential : The maximum offsprings an animal can produce is called its biotic potential.
  • Demography : Statistical study of population vis-à-vis natality, mortality, migratory movements, age and sex among other social ethnic and economic factors.
  • Ecological Death : The death of an organism due to environmental factors is called Ecological death.
  • Habitat : Natural place of living is called habitat.
  • Herds : A number of breeding group of species.
  • Home range : It is the territory larger than home where individuals can roam about and safely hunt for their food.
  • Migrant : An animal that moves from one habitat to another.
  • Monogamy : State where a single male pairs with a single female in partnership that may last for several seasons or life. Common in birds, wolves and in human beings.
  • Mortality rate : The rate at which individuals are lost by death is called mortality rate.
  • Natality : Birth rate, frequency of number of deaths in proportion to the population.
  • Polygamy : Living in herds having one dominant male and rest female.
  • Population : A geographical localized group of individuals of the same kind at a particular time represents a population.
  • Population Density : An ecologist measures the changing population by counting and recording individuals from a large area at various studies. This measure of population density is expressed as number of individuals in a definite area at a specific time.
  • Population dynamics : Aggregate of processes that determine the size and composition of any population.
  • Population explosion : The increase in accelerating rate is called population explosion or in other words, expansion of human population without restrain is termed population explosion.
  • Population pressure : Suppose environmental conditions remain same, the surplus of individuals result in population pressure.
  • Species : A group of organisms which are closely related structurally and physiologically and interbreed among themselves to produce young ones of their own type.
  • Species and Population – Natality rate : The rate at which the new individuals are added to the population by reproduction is called natality rate.
  • Territoriality : Pattern or behavior in which one or more animals occupy and defend a definite area or territory.
  • Territory : An area of land occupied by a single animal or a group of animals and actively defined by them.