pa county populations

The present population of a county is 582,552. 163,204 people were relocated out of the county due to floods. Find the total population of the county before the relocation. => 745,756 or 745,755 or 745,750 or 745,705..

Individuals living in the same area are referred as local populations. They all experience similar ecological processess at a particular stage of the life cycle. Similar populations of a species occupying different geographical areas are called sister populations. ..

. Sigmoid growth curve is formed of five phases. a) Lag phase b) Positive acceleration phase c) Logarithmic or exponential phase d) Negative acceleration phase e) Stationary phase. a) Lag phase - Period where individuals adapt to the new environment. b) Positive acceleration phase - Period of ..

Summary - Smallest unit of ecological hierarchy is the organism, while smallest and basic unit of taxonomic hierarchy is species. A group of individuals, having similar structural and functional characters, capable of potential interbreeding is termed as species. In nature all apecies exhibit ..

Malthus' Theory of Population - A British economist Malthus'(1778) proposed a theory that population grows at geometric proportion and after the imbalance between population and resources is set in, population is automatically checked by natural disaster..

A TV tower has a height of 100m. How much population is covered by the TV broadcast if the average population density around the tower is 1000 km - 2 ? Given radius of earth = 6.37 x 10 6 ..

A sigmoid curve is characterised by a lag phase (wherever the growth rate is negligible), positive acceleration phase (wherever the growth rate is moderate), logarithmic phase (where in the growth rate is high) and negative acceleration phase (where in the growth rate is 0)...

Biotic Stability - Since a biotic community is formed of a large number of diverse type of populations of plants and animals and microbes, all these populations are essential for biotic stability. By definition 'biotic stability is the absence of any major fluctuations in the ..

a) Local species diversity is directly related to the efficiency with which the predators prevent the monopolization of an environmental area by any species. b) Predation keeps the prey population under check, so as to maintain an ecological balance. c) Weak and less efficient membe..

A biosphere reserve preserves a) wild population b) life style of tribals c) genetic resources of domesticated plants and animals. It helps in 1) conservation 2) promotes economic development 3) Scientific research, monitoring and educati..