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Explain the Malthus' Theory about population growth?
Darwin's Theory was also based on Thomas Malthus' writings on population growth, in which he explained that populations grow geometrically. For instance, a population may double every generation, whereas the food supply increases only arithmetically (that is, increases by a constant number - say 3 for instance - whereby 3 increases to 7, to 11, 15, and so on). If reproduction were allowed to continue unchecked, a population like elephants would cover the earth's surface before long. The fact that the earth isn't covered with elephants can be attributed to natural causes that limit the population growth. Natural causes such as death, disease, and limited resources serve to keep population levels down.
Cyanotic Heart Disease In this there is a communication between Pulmonary and systemic circulation through which venous blood enters the systemic circulatory system. The infa
Extremes of Heat and Cold Deserts are regions of aridity with rainfall of less than 20 cm per year and the soil, though L, fertile, is too porous to retain any water. In summer
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Q. Which is the kind of muscle tissue that contracts and relaxes the heart chambers? The myocardium of the heart is made of cardiac striated muscle tissue.
Define Herbals - Old books about Plants? During the Middle Ages, following the decline of the Greek and Roman civilisations, little significant botanical progress was made. The
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