polar bear remains ever found. Accelerator mass spectrometry was used to determine the age of a canine tooth left on the jaw. It was estimated to be approximately 130-110 ky old. It is said that this jawbone confirms that the polar bear was already a species at least 100 ky ago and was preserved due to the low temperatures and permafrost that was present during that time. Tests such as “next generation” sequencing technology and isotopes analyses of carbon and nitrogen of past and present environments
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socket‚ the claws‚ the wings‚ and the inherited able to fly. The Archaeopteryx lived in the Jurassic Era. That eventually ended in extinction. “The Cretaceous Tertiary or K-T extinction‚ which was a mass extinction of the animals and plant species that were on Earth that occurred over million years ago. This served as conclusion of the Cretaceous period” (Alvarez‚ Alvarez‚ Asaro‚ and Michel).
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fields such as ecology‚ demography‚ taxonomy and genetics. This would help in the understanding of the management of species in their ecosystems‚ breeding‚ genetic analysis and their resoration of their habitat. The main reason for conservation biology is to help in establishing workable ways for preserving species and their biological communities‚ by protecting threatened species‚ creating breeding programs to help in maintaining the genetic instability in the small populations. Biodiversity is
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Speciation Tiffany Johnson SCIE/211 Laura Stepp Purpose What would happen if a species within a population were to suddenly split in two groups by an earthquake that creates a physical barrier like a canyon? Introduction Reproduction is a natural and normal thing in our day to day lives. Animals and humans reproduce offspring‚ all year round. Separation is usually the furthest thing from our minds. But‚ mother natural can always turn anyone’s world upside down. For Example
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Many different plant and animal species thrive in the rainforest environment‚ but it is the trees that define the way we see the rainforest. From the air‚ a rainforest looks like an enormous‚ green carpet. The canopy very rarely breaks‚ with no gaps between the trees. Beneath these trees‚ there are thousands of different types of plants. Living amongst the trees‚ vines‚ shrubs‚ ferns‚ and mosses are many different types of animals. These range from the smallest ant to the carnivorous (meat-eating)
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BIODIVERSTY the term "biodiversty" has been derived from ’bio’ and ’diversity’."Diversity" means variety within a species and among species.Biodiversity is a measure of the variety of organisms present in different ecosystem. Diversity of plants and animals the diversity of plants ’(flora) and animals’(fauna)’ ia region depends on climate‚altitude‚soils and the presence of other species.it is the richest in the tropics. biodiversity found on earth today is the result of 4billion years of
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Abstract Constructing a cladogram to determine the related species and the evolutionary history. Five mammalian species‚ which are dog‚ cat‚ horse‚ opossum‚ and deer‚ are distributed into cladogram based on morphological character and molecular data. This allows identifying the relatedness of these species. By their appearances of structures and behaviors‚ the dog and cat eat meet while deer and horse eat plants. This prediction leads to the hypothesis that car and dog are close whereas deer
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Sand dunes are a very important part of the ecosystem. They hold many plant and animal species‚ some of which are even endangered or on the verge of extinction. People of the community and non-profit organizations have been trying to preserve the sand dunes for many years. Sand dunes are destroyed by winter storms and hurricanes. But that is just part of nature. People destroy sand dunes. When people walk on sand dunes‚ they leave weak spots. The wind picks up the sand and carries it out to sea
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the manipulation of plants and animals to suit human needs. The article states that it is a gradual process‚ and domestication itself is not initially the goal. Domestication is the result of human efforts over an extended amount of time in which a species evolves to fit a desireable genotype/phenotype. In the reading it is also stated that domestication may have sparked social change in Africa. With domestication came herding and pastoral lifestyle‚ a lifestyle which favored certain social structures
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be more successful in producing young (because they survive to adulthood). If there was no color variation‚ or if a predator that tended to pick the brightly colored fish was absent‚ then there would be no natural selection pressure driving the species towards more drab colors. Which of the following facts is least useful to a taxonomist trying to place animals in the same genus? Animals with shared ancestors have more DNA in common than animals that do not share ancestors. DNA contains the
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