Amphibians are becoming a vanishing species. There are a number of causes for them dieing. But the most recent and worst cause has been discovered. It is responsible for killing off our amphibians. They are dieing by the thousands. They were able to survive and hold on through past extinction spasms‚ surviving even when 95 percent of other animals died out. They even stayed alive when the dinosaurs disappeared. If amphibians could live longer than dinosaurs‚ then why are
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LEAVES BIODIVERSITY HOTSPOTS? A. ELIZABETH ARNOLD1 AND F. LUTZONI Department of Biology‚ Duke University‚ Durham‚ North Carolina 27708 USA Abstract. Fungal endophytes are found in asymptomatic photosynthetic tissues of all major lineages of land plants. The ubiquity of these cryptic symbionts is clear‚ but the scale of their diversity‚ host range‚ and geographic distributions are unknown. To explore the putative hyperdiversity of tropical leaf endophytes‚ we compared endophyte communities along
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Estimated Number of Animal and Plant Species on Earth Believe it or not‚ there are about 950‚000 species of insects No one knows for sure how many species of animals exist on Earth. In fact‚ some 10‚000 species of animals are discovered each year‚ with over one and a half million species already described. Projections for the total number of species on Earth range from 2 million to 50 million. Animal group Number of species Vertebrates Amphibians 6‚199 Birds 9‚956 Fish 30‚000 Mammals
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Problem Set 1 Solutions: Chapters 1 1 Cell sizes: E. coli is a cylindrical bacteria with 1 M wide and 2 M long. Liver cells are approximately spherical with a diameter of 20 M. Plant palisade cells are cylinders 20 M wide and 35 M long. A) Calculate the volumes of each cells? A) Since E.Coli is cylindrical Volume of a cylinder = r2h‚ where r is half of bacterial width/diameter = 1M/2 = 0.5M and h is the length of the bacteria
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Botany Lab Introduction to Microscope Circa 1000 AD. = the first vision aid was invented (inventor unknown) called a reading stone. Circa 1284= Italian‚ Salvino D’ Armante is credited inventing the first bearable eye glass. 1590= two dutch eye glass makers‚ Zaccharias Janssen and Hans Janssen experimented with multiple lenses. 1665= English Physicist‚ Robert Hooke looked at a silver of cork through a microscope lens and noticed some “pores” or “cells”. 1674= Anton Van Leeuwenhoek built
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Mindanao gum. According to the study of Bughio‚ Mangrio‚ Abro‚ Jahangir and Bux‚ it has been found that Eucalyptus species release volatile compounds such as benzoic‚ cinnamic and phenolic acids which inhibit growth of crops and weeds growing near it. Phenolic acids and volatile oils released from the leaves‚ bark‚ and roots of certain Eucalyptus spp. have deleterious effects on other plant species. In the study of Bughio et al.‚ using the eucalyptus camaldunlensis as allelopathy agent against Acasia nilotica
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The Vanishing When a foreign film is remade the director tends to change things like the characters‚ relationships between the characters‚ organization of the plot‚ symbols‚ and the theme to appeal to American audiences. Why is that? Maybe it’s because “[Americans] just haven’t overcome the language barrier” or that “[foreign] films move at a much slower pace than [American movies]” like Fred Hift states in his article “Film – European movies: Looking for an American audience.” Often time’s American
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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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Transgenic Animals and Plants What is a transgenic animal/plant? A transgenic animal or plant is one that has a foreign gene (called a "transgene") inserted into its DNA. Transgenic animals and plants are sometimes called "genetically modified organisms" or GMO ’s for short. What is a transgene? A transgene is the foreign gene that has been moved from one organism into a new organism by genetic engineering. For example‚ a bacterial gene that is inserted into a plant ’s DNA would be a
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have identical DNA. Sometimes‚ plants are self-pollinated‚ producing seeds and eventually more plants with the same genetic code. Some forests are made entirely of trees originating from one single plant; the original tree spread its roots‚ which later sprouted new trees. When earthworms are cut in half‚ they regenerate the missing parts of their bodies‚ leading to two worms with the same set of genes. However‚ the ability to intentionally create a clone in the animal kingdom by working on the cellular
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