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Darwin while evolving the concept of natural selection laid emphasis on competition among individuals belonging to a species, that is intraspecific competition. Here the individuals compete for almost identical requirements from the environment. Competition between individuals belonging to different species, that is interspecific competition is also observed in nature. In the following subsection we shall discuss the essential differences between the two types of competition, and subsequently highlight the role of natural selection in evolving coadapted colnmunities of closely related species.
Explain the terminology Niche ? The term niche is used often in ecology, and its meaning has been defined and interpreted in various ways over the years. An organisms niche has
Q. Function of Adenosine in consciousness? The adenosine plays a major role in inducing sleep. Injections of adenosine promote sleep and decrease wakefulness. Conversely, adeno
Indications for Surgery : The normal mitral valve area is 4-5 cm 2 . Usually symptoms appear when the valve area has become less than 2.5 cm2. Symptoms are present at rest when t
Q. Drugs and Insulin used in diabetes? When diet, exercise or even weight reduction do not improve the diabetic symptoms and blood sugar levels, the uses of hypoglycemia drugs
Explain the term Blood Blood is a fluid and consists of plasma and blood cells. More than 90 percent of plasma is water. Other constituents of plasma are plasma proteins i.e. a
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Please help with the following: Using the letters S for ribose sugar and B for the nitrogeneus base, draw a diagram that shows the arrangement of these components into (a) a sin
need different types of information about fishes and their pictures
How were the classification systems of Aristotle and Linnaeus similar? Both systems divided all living things into two major groups, animals and plants, but Aristotle's system
How is the concept of chromosome related to the concept of the gene? A chromosome is a DNA molecule and chromosome may contain several different genes and as well DNA portions
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