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PopulationYou must be familiar with the term 'population'. It is one of the most talked about issues of this century. It is feared that the rapid growth of the world population if allowed to continue, might outstrip the food supply in the near future. The present high rate of population growth is a major concern of the governments, scientists and administrators. Have you ever wondered as to what is meant by population?In a technical sense 'population' is defured as a group of freely interbreeding the same species present in a specific area at a given time. For example, when we say thatindividuals of the population of a city is 50,000, we mean that there are 50,000 individuals of Homo sapiens in that town. Other living organisms, for example cats and dogs present in the city are not included as they are populations of two different species.In nature, population of a species is subdivided into a number of local breeding populations called deme. Demes are geographically separated populations of the same species. For example, the garden lizards of Qutub Minar. Delhi, form a separate deme from the garden lizard of Lodi Gardens, Delhi or the garden lizards of Swaraj Bhawan, Allahabad. Consequently, in a deme each individual has an equal opportunity of mating with another individual of the opposite sex, but not with individuals in another deme. Because of frequent mating and similar environmental conditions members of a deme resemble each other more closely.A population exhibits certain characteristics which can only be expressed at the population level and not shared by the individuals of the population. For example, individual organisms are born, grow and die but characteristics such as birth rate, death rate, density are only meaningful at the population level.
Aspergillosis Aspergillosis is the most common chronic, granulomatous, necrotizing and cavitary disease of lungs, and is characterized by formation of white yellowish caseous
What is mass transportation across the cell membrane? Mass transportation is the entrance or the exiting of substances in or from the cell engulfed by portions of membrane. The
Q. Why are the salt and sugar used in the production of dried fruits and dried meat? Substances that sustain a highly hypertonic environment, like salt and sugar, are used in t
what is the warmest and coldest parts of the boy
What important changes will you find in the tissue of the fat person from those of a lean and thin person
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Which of the following is true for a toe motor neuron that excites a toe muscle that moves the big toe in the left foot? A. All of the axon terminals of the toe motor neuron ar
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Define Food Science as a Discipline and Modern Developments? As an undergraduate student you may have taken a course in food science and technology. Do you recall, what did the
Q. Write the definition of communication? Communication is "a process of transmitting ideas, information, attitudes (images which we have formulated for ourselves) by the use o
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