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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.
Exercise Stress or emotional upset Medications Aspirin, non-steroidal anti-inflammatory drugs(NSAIDs), beta- blockers(including eye drops), cholinergic dr
Subphylum Mandibulata Most of them have three pairs of walking legs, mandibles, compound eyes, antennas, some with wings. There are four classes. Crustacea - aquatic with
What is a stream? A stream is a incessant series of bytes that flow into or out of your program. Input and output from devices like the mouse, , disk, keyboard, screen, modem, a
Q. Nervous System control of blood pressure? Most nervous controls are achieved via involuntary reflex arcs involving pressoreceptors, the vasomotor centers of the medulla, and
Explain about Oil-bearing fruits Oil-bearing fruits, nuts and seeds have been grown and used for food for many centuries. More than 100 varieties of plants are known to have oi
Explain Pennate diatomsrole in diatoms? Pennate diatoms have bilateral symmetry, which presents side-by-side mirror images if divided down the middle or centerline, as seen
Q. Nutritional Management for lactose intolerance? Diagnostic tests are available that can give information about the level and activity of the lactase enzyme. Depending on the
1. One of the greates challenges following the human genome project is to understand how genes are regulated and what functions they perform. a. Define the terms 'Transcriptomic
LOCOMOTION IN STAR FISH - With the help of tube feet aided by fluid pressure in them. In a tube feet upper ampulla, middle podium and lower sucker present.
The lithosphere contains all of the hard solid land of the earth crust and the semisolid land underneath the crust. The surface of the lithosphere is very uneven contains high moun
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