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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.
DE A T H - It is terminal end of the degeneration changes of old age. Death occurs when vescular system & respiratory system stop working. Failure of nervous system ma
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what direct or indirect effect is " acid rain" thought to have on (I) lakes, (ii) forests and (iii) buildings
What is optic nerve The optic nerve contains more than one million axons that initiate in the ganglion cell layer of the retina. This structure originatcs at the back of the e
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Identify the hormones produced by the anterior and posterior lobes of the pituitary gland and specify the functions of those hormones.
A.N.S. (Autonimic Nervous System) Name given by Langley . Controled by Hypothelamus. Partially independent system. Controls involuntary actions as heart beat, breathing,
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