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  • Species
    260 words
    I cannot significantly improve on the assertion that it simply is proper for us, as intelligent members of the universe, to try to look after our fellow creatures, and evil for us to do otherwise. -- Colin Tudge, 1992 Last Animals at the Zoo Endangerment is everyone's problem. This Expedition presents an ample cross-section of the conservation challenges we are facing. However, trying to understand how the natural world operates is never an easy task. The effort to do so has been compared to wat...
  • Killing Of Endangered Species
    707 words
    Endangered species are living things whose population is so reduced that they are threatened with extinction. Thousands of species are included in this category. The International Union for the Conservation of nature and Natural Resources publishes a list of threatened mammals, birds, reptiles, amphibians, and (many people dont consider them) plants. CAUSES OF EXTINCTION Millions of years before humans, extinction of living things was linked to geological and climate, the effects of which were t...
  • Sixth Extinction
    1,226 words
    So, what is the Sixth Extinction When is it coming and what is its cause It is happening now, and we, the human race are its cause explains Richard Leakey. This phenomenon Leakey argues, is easily comparable with the big five biological crisis' of geological history, except this one is not being caused by global temperature change, regression of sea level, or asteroid impact. It is being caused by one of Earth's inhabitants. According to Leakey, humanity is poised to become the greatest catastro...
  • Extinct Disappearance Of Species
    417 words
    GEOGRAPHY NOTES. Since European settlement between 78 & 100 plant species have become are extinct. 150-200 under threat... GENETIC DIVERSITY - safeguard species diversity. Large range of genetic forms within each species. Genetic variations... Extinct- disappearance of species after thorough searching (some extinction is natural). At risk- in danger of becoming extinct. Endangered- close to extinction in the wild unless something is done the species could disappear altogether. Vulnerable- The st...
  • Examples Of Species
    1,182 words
    Biodiversity is the measure of variety of the Earth's animal, plant and microbial species; of genetic differences within species and of the ecosystems that support those species. The term first came to public attention in 1992 at the Rio Earth Summit at which a convention for the preservation for the maintenance of biodiversity was signed by over 100 world leaders [excluding the USA as they feared it would undermine the patents and licences of US biotechnology companies] The maintenance of biodi...
  • Sudden Extinctions At The K T Boundary
    2,378 words
    ABSTRACT Several mass extinctions have occurred during the Earth's history. The Cretaceous - Tertiary Boundary (K-T) Extinction caused the loss of at least three-quarters of all species known at that time including the dinosaurs. The cause of this mass extinction is a controversial subject among scientists but the fossil evidence of it's occurrence is abundant. INTRODUCTION The K-T Extinction occurred 65 million years ago. Many species perished in that extinction. Today evidence for this extinct...
  • Marine Evidence For The Ptb Extinction Event
    7,948 words
    The End Permian Mass Extinction Outline I. Introduction Think of a world which existed 290 million years ago. As you look out over the terran in front of you, you think that you are on an alien planet. You see volcanoes spewing ash and lava. Beside them is the ocean which is swarming with many different species of echinoderms, bryozoans and brachiopods. As you look down onto the sea floor you are amazed at the countless number of starfish and urchins. Some animals leave you cant even describe an...
  • Protection Of Endangered Species And Habitats
    1,477 words
    Endangered Species of South America Endangered species are plant and animal species that are in danger of extinction, the dying off of all individuals of a species. Over 19,000 plant species and 5000 animal species around the globe are classified as endangered, and many thousands more become extinct each year before biologists can identify them (Microsoft 1). The primary cause of species extinction or endangerment are habitat destruction, commercial exploitation, damage caused by non-native plan...
  • Endangered Species Recovery Process
    1,577 words
    Introduction: In the past three decades very few endangered species have been restored to viable populations. The black footed ferret (Mustela ni gripes) was believed to be the most endangered mammal in the united states. It is a small mink sized carnivore of the Great plains and intermountain basins The ferrets appear to be obligatory predators on the prairie dogs and once occupied a range essentially identical to that of the prairie dogs. They prey on them and also use their burrows for shelte...
  • Cause Of The Permian Mass Extinction
    10,655 words
    Introduction Earth probably began about 4.5 billion years ago. A history of this life on Earth is recorded in fossil remains and traces of past life. It is a record of evolution for both life and the planet. Life and the planet have co-evolved, with life causing changes to the planet which in turn drive changes in life. The Fossil Record A history of these changes is recorded in the layers or 'strata' of rock laid down over the millions of years, and by changes in the groups of fossils found in ...
  • Extinct Due To Human Activities
    387 words
    Year 12 SAME Biology Ecosystems 1. List ways in which Humans practices can lead to major changes in communities. Give specific examples with data to support. The ways in which human practices can lead to major changes in communities are as follows: - Land degradation - Polluting (waterways) - Clearing land - Intensive Farming (grazing, crops) - Urban sprawl - Deforestation For example, Marine Ecosystem Pollution has been and still is a major problem in Novi Scotia surface waters. An abundance of...
  • Species Extinction
    2,980 words
    Of all the species that have lived on the Earth since life first appeared here three billion years ago, only about one in a thousand are still living today. All the others have became extinct usually within ten million years after they first appeared. This in turn has contributed greatly to the current level of biodiversity on the planet. Extinction is the loss of populations of interbreeding organisms. It can be caused by habitat destruction, predation and the inability to adapt to changing env...
  • Permian Mass Extinction As A Result
    1,015 words
    Extinction is, quite literally, the end of a particular evolutionary line, the end of a species, a family, or a larger group of organisms. While it may be bad news for the victims, it's a 'natural' event in the history of life on earth. Extinctions, mostly at the level of species, have been occurring constantly at a low 'background rate', usually matched by the rate at which new species appear - with the result that biodiversity is constantly increasing. But there have been periods in the Earth'...
  • Of The Species Within The Family
    1,442 words
    Introduction A Hominid is any member of the biological family Hominidae, or more commonly known as the great apes. Hominids are categorised in these areas, Kingdom: Animalia, Phylum: Chordata, Class: Mammalia, Order: Primates, Suborder: Haplorrhini, Infra order: Simiiformes, Parvorder: Catarrhini, Superfamily: Hominoidea, Family: Hominidae. The Hominidae family includes humans, chimpanzees, gorillas, and orangutans, as well as many other extinct species. The family has caused much division withi...

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