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
- 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 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.