"On the Origin of Species" Essays and Research Papers

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    Endangered species

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    Endangered species are those considered to be at risk of extinction‚ meaning that there are so few left of their kind that they could disappear from the planet altogether. Endangered species are threatened by factors such as habitat loss‚ hunting‚ disease and climate change‚ and usually‚ endangered species‚ have a declining population or a very limited range. The current rate of extinction is thought to be far greater than the expected natural rate‚ with many species going extinct before they have

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    Endangered Species

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    altered and modified‚ but these tend to happen at a gradual pace. This allows most species to adapt to the changing environment‚ where only a slight impact may take place. However‚ when changes occur at a fast pace‚ there is little or no time for an individual species to react and adjust to the new circumstances. This cause disastrous results‚ and for this reason‚ rapid habitat loss is the primary cause of species becoming endangered. Nearly every region of earth has been affected by human activity

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    Endangered Species

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    ENDANGERED SPECIES Introduction An endangered species is a population of organisms which is at risk of becoming extinct because it is either few in numbers‚ or threatened by changing environmental or predation parameters. The International Union for Conservation of Nature (IUCN) has calculated the percentage of endangered species as 40 percent of all organisms based on the sample of species that have been evaluated through 2006.Many nations have laws offering protection to

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    Species Evenness

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    The species richness is when we talk about the actual number of species in a community. For example‚ if you go to a bottom ground forest you might see only sugar maple. Therefore‚ the species richness is only 1. Shannon Index measures species diversity too‚ but takes into account species evenness. Species evenness is when the relative abundance of the species in that community are more similar to each other. So by knowing that you have more similar species‚ this allows you to more accurately determine

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    Threatened Species

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    Biodiversity has been on the decline over the past century and the background rate has been mostly accelerated by the humans. Considerable damage has already been done. Possible solutions have been discussed and categorising species according to how in danger they are is one of those solutions. Below are some of the threatened organisms in different continents around the world. TABLE OF CONTENTS Africa Mammals Birds Reptiles Amphibians Fishes Asia Mammals Birds Reptiles

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    Endangered Species

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    The Asiatic lion (Panthera leo persica)‚ also known as the Indian lion‚ is a lion subspecies that exists as a single isolated population in India’s Gujarat State. It is listed as Endangered by IUCN based on the small population size.[1] The lion population has steadily increased in Gir Forest National Park‚ more than doubling from a low of 180 individuals in 1974 to a level of 411 individuals consisting of 97 adult males‚ 162 adult females‚ 75 sub-adults‚ and 77 cubs as of April 2010.[3] The Asiatic

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    Endangered Species

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    off the endangered species list. Many people think that they cannot do anything to help these poor animals‚ but they are wrong. There are many ways in which people can help to keep these animals from becoming endangered or help save them. There are many endangered animals and they come in all shapes and sizes. Ninety-nine percent of the earth ’s creatures have become extinct. Just in the United States more than a dozen insects‚ mostly butterflies are on the endangered species list‚ along with over

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    The origin of the Philippines The Philippines is a country of Southeast Asia‚ with its 7‚107 islands strewn over the Western Pacific Ocean‚ approximately 13 N of the equator and 122 E of Greenwich. Its collective land area is about 300‚000 sq. km‚ about the size of the state of Arizona. This island archipelago is one of the most megadiverse countries in the world‚ housing over 5% of the entire world’s flora in an area not even 1% of the world’s total. An estimated 10‚000 to 11‚000 species of plants

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    Invasive Species

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    Shannon Angus Mrs. Cumbee January 9‚ 2013 Foreign Invaders Invasive species are groups of organisms that are unnaturally occurring to an area. When introduced‚ they can cause economic and physical harm to humans and ecosystems. The importing‚ legally and illegally‚ of invasive species into our society is not only harmful to our population and our ecosystem but also the population of plants and animals in their indigenous homeland. To continue‚ the smuggling of plants and animals into new

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    Invasive Species

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    their name from their painful stings and bites. They are a special type of ant that is actually a health threat and an environmental threat as well. They are small yellowish-red to black ants‚ all in the Genus: Solenopsis. The two most important species are the Red Imported Fire Ant (RIFA)‚ Solenopsis Invicta‚ and the Solenopsis xyloni. It is found in the family Formicidae. This small insect can mean big problems for people and animals. The habitat of the fire ant has contributed to its rapid

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