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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.
There are several anaplerotic reactions required to replenish intermediates of the TCA cycle. All of the following compounds can be used for these anaplerotic reaction except: -
Q. Write the definition of counselling? Definition of counselling "A process of helping or enabling a person / persons to solve certain interpersonal, emotional problems and
Enumerate the Sizes and shapes of eukaryotic and prokaryotic cells It is thus possible, due to these similarities, to generalise about the structures and functions of cells. In
NASA L CHAMBER - External nares are 2 in number, i.e., dirhynous. Situated at lower side of nose. Open into nasal chamber. Nasal chamber opens into pharynx by internal n
Term Translation or protein synthesis, is quite similar in eukaryotes and prokaryotes. We will look at the details of the process in prokaryotes and consider the differences in euk
Cnidaria and Platyhelminthes - Larval forms Cnidaria The common larval stage that is found in cnidarians is the planula which forms following gastrulation. The planula is
What colors of light are needed in a grow light for strawberry development?
Intra Oral Periapical Radiographs These can either be taken conventionally or by the help of RVG (RADIO VISUO GRAPHY). RVG offers certain benefits over conventional X-Rays suc
What is the formula for calculation of bone distortion The following formula can be used to calculate for distortion: Effective Bone available = Reference sphere diameter ×
what is ribosomes
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