Environment Science

a )Nt N0 (ert ) whereNt Population at time t 2006 6 billionN0 Starting universe size 6 billion humansr intact Rate of Natural Increase 1t Time 46 yearsNt tribe at 2005 humansbThe recent advances in medicine public health and hygiene have lowered the death rate of Sweden . in addition , the birth rate is controlled by elbow direction of public sentiency , education and family planningc ) Ecological Foot instill is a resource charge tool that measures how much land and urine argona a human population requires to produce the resources it consumes and to absorb its wastes nether prevail technology . It is the amount of productive land field of honor inevitable to sustain ane persond The ecological foot print of the universe today is approximated to be 5 earths .We maintain this wave-off by liquidating the planet s ecologica l resourcese ) World population and whole step 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 . Evolution and ecologya ) whizz of the roughly misunderstood terms is the phrase survival of the fittest . literally translated , it subject matter survival of the survivors , a meaningless contestation in the biologic sense . Survival of the fittest in the biological sense means that only those fit enough to be able to purge ass ensure the continuity of their species . Those unstable , those who die earlier they can pass on their transmittable data forget ultimately cease to exist . A very intimately example of this is in the peacock s rat feathers These tail feathers are brightly colored , hereby change magnitude their chances of survival .

til now , the main purpose of these feathers is to attract prospective mates , increase their chances to reproduce and ensuring the continuity of their lineb ) Trophic level is the position an organism holds in the regimen chain or web . In a simplified ecosystem composed of food shrubs , rabbits , and lynxes , we can find three trophic levels . First is the rump species , the primal maker or autotroph which produces zip fastener thru variation of environment factors , in this case the food shrub . aliment upon the food shrub are the rabbits , perishing to the second trophic level . The rabbits are heterotrophs considered to be the primary consumers since they obtain energ y or persist upon the primary producer The lynxes belong to the ternion trophic level . They are also heterotrophs that are secondary consumers , feeding upon the primary consumers , which in this case are the rabbitsd )The lynxes and rabbits belong to a predator prey relationship Predators and prey can influence one another s evolution . The resulting pattern follows the Lotka-Volterra mould developed individually by Alfred Lotka and Vito Volterra in the 1920 s . This model shows that two predator and...If you neediness to get a full essay, order it on our website: BestEssayCheap.com

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