Environment Science

a )Nt N0 (ert ) whereNt Population at time t 2006 6 billionN0 Starting tribe size 6 billion humansr native Rate of Natural Increase 1t Time 46 yearsNt macrocosm of discourse at 2005 humansbThe recent advances in medicine habitual health and hygiene have lowered the death appreciate of Sweden . similarly , the birth rate is controlled by essence of public aw atomic number 18ness , education and family planningc ) Ecological Footprint is a resource caution tool that measures how much charge and body of water area a human population requires to produce the resources it consumes and to drag its wastes under accustomed technology . It is the amount of productive land area infallible to sustain unrivalled persond The ecological pedestal print of the mankind today is approximated to be 5 earths .We hold on this oversh oot by liquidating the planet s ecological resourcese ) World population and footprint 6B 2 .3 ha /person or 5 earthsCurrent U .S population and footprint0 .28B 9 .7 ha /personRest of the world 5 .72B 4 .85 ha /person (9 .7 /20 .28 /6 0 .046667 9 .7 0 .452667 5 .07633 5 11 .03551 earths5 .72 /6 0 .953333 4 .85 4 .623667 2 .35 .07633 ha /person2 . growth and ecologya ) One of the just about misunderstood terms is the explicate survival of the fittest . Literally translated , it bureau survival of the survivors , a vacuous statement in the biological sense . Survival of the fittest in the biological sense means that only those fit tolerable to be able to purge give the sack ensure the tenaciousness of their species . Those unfit , those who die earlier they can pass on their genetic data pull up stakes eventually cease to exist . A very sizable specimen of this is in the peacock s tail feathers These tail feathers are brightly colored , hereby decreasing their chances o f survival .

heretofore , the principal(prenominal) purpose of these feathers is to attract prospective mates , increase their chances to sick and ensuring the continuity of their lineb ) Trophic take aim is the position an existence holds in the nutrition chain or web . In a simplified ecosystem composed of food pubic hairs , rabbits , and lynxes , we can recall three trophic levels . First is the foundation species , the bang-up maker or autotroph which produces energy thru conversion of environs factors , in this case the food shrub . Feeding upon the food shrub are the rabbits , belonging to the second trophic level . The rabbits are heterotrop hs considered to be the primary consumers since they obtain energy or consume upon the primary producer The lynxes belong to the third trophic level . They are also heterotrophs that are secondary consumers , victuals upon the primary consumers , which in this case are the rabbitsd )The lynxes and rabbits belong to a marauder prey relationship Predators and prey can tempt one another s evolution . The resulting pattern follows the Lotka-Volterra sit demonstrable one by one by Alfred Lotka and Vito Volterra in the 1920 s . This model shows that both predator and...If you need to get a well(p) essay, order it on our website: BestEssayCheap.com

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