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ENGL 100
David Murray

Dr. Peter Boag Biology 103 Required Readings Evolution: Nothing in Biology Makes Sense Except in the Light of Evolution - Natural selection may cause a living species to respond to the challenge by adaptive genetic changes - These changes may enable the species to occupy the formerly empty ecologic niche as a new opportunity for living, or to resist the environmental change if it is unfavorable - Lack of successful response may cause the species to become extinct - Amino acid sequences in a given kind of protein vary within a species as well as from species to species The Tragedy of the Commons - A finite world can support only a finite population; therefore, population growth must eventually equal zero - To live, any organism must have a source of energy - This energy is utilized for two pur- poses: mere maintenance and work. For man, maintenance of life requires about 1600 kilocalories a day - We must make the work calories per person approach as close to zero as possible. - a positive growth rate might be taken as evidence that a population is below its optimum - The positive component is a function of the increment of one animal. Since the herdsman receives all the proceeds from the sale of
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