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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.
Spinal nerves: They take their origin from the spinal cord. They are the mixed nerves having both sensory and motor fibres. There are 31 pairs of spinal nerves. The se
In this section we are to discuss the means by which populations get separated or isolated from each other, first gain the status of'Sub-species and finally evolve mechanisms which
Risk Assessment of Biological Hazards Biological hazards of concern to public health include pathogenic strains of bacteria, viruses, helminths, protozoa, algae and certain tox
Explain Basal Metabolism Rate (BMR) - Ageing? From age 25 years, the basal metabolism decreases by about 2 percent for each decade due to the increasing proportion of body fat
questions and answers on human impacts on environment
How can the blood coagulation (clotting) process be described? Blood clotting encompasses a sequence of chemical reactions whose respective products are enzymes that catalyze t
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Food Which can be Taken in Plenty and Food to be Avoided Lastly, in the context of changing the diet, we should know the foods to be avoided and the food to be taken in plenty
In addition, pregnancy or constipation may worsen GERD by increasing intra-abdominal pressure. Secondary causes of GERD include reflux caused by acid hypersecretory states, connec
Define Proteins as regulators of water balance? As substrates and solutes are transferred or exchanged across membranes, water has a tendency to follow to maintain equal osmoti
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