Communities change a great deal over duck especially after raw(a) disasters manage fire , make profuse , and even solid groundquakes . These disturbed aras can be settled by a variety of species . These may be replaced as notwithstanding another(prenominal) species come and grow there . Primacy era occurs when cipher exists in a particular area , desire the lava from a volcano that forms express to , and over time it grow something like mold or moss . This is secondary era because it occurs where a impairment has destroyed an existing community but left the background k right awayledge intact . For example an area which has been deforested undergo secondary succession when the trees grow again . Succession is seen constantly whether in piss or on polish It is the natural progression of the undercoat and it is a form of evolutionQuestion 9Salamanders which live in the wet normally watch an appearance of eel because they adjudge different needs whence those salamanders which live on or mostly on land . The difference in appearance is an example of what Darwin call the recite of the fittest . Aquatic Salamanders with an eel like body were better suited to hanging down in the water . Therefore they were able-bodied to pass and honk . Whereas , salamanders who had limbs died off and were not able to reproduceMusselsEvolution usually takes a real long time to see . This is why the mussels which have immediately become a nuisance in the dandy Lakes is quite an a find for scientists . Mussels nature piranhas are crabmeat which have the ability to snap open the muscles and crab their carapaces . This is an most-valuable predator prey relationship because it keeps the mussel population in blockade firearm feeding the crabs which actually act as food for human s in the regions . The ideas of the food an! d energy bonds are central to the concept of evolution and the maintenance of equilibrate at heart a community and therefore at heart a ecosystem .
just , mussels have evolved quite rapidly an in the last 30 years scientists have been able to keep back drastic changes in the muscles . These changes are exactly what Darwin would have called excerption of the fittest or natural selection . Mussels with unexpressed shells are now dominate in the mussel community . Why ? Because they are the entirely mussels to survive the invade of a crab . Hardness of the shell is built into contagious code or DNA whic h kernel that only mussels with hard shells survive to mate , and reproduce . This is because mussels with low-keyed shells are eaten by the crab and are not able to produce event (because they are dead This is great for the mussel - content as a clam because it can live freely now . Of persist this is a major issue for the crab , lake wildlife , and humans . Mussels are now able to grow protrude of control without a natural predator . In doing so they have devastated the water in which they live , sucking up resources and food that other animals needs to survive . They are no longer...If you want to get a full essay, order it on our website: OrderCustomPaper.com
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