Chapter 5: Water and Seawater Review Questions (2‚ 4‚ 5‚ 6‚ 7‚ 8‚ 9‚ 10‚ 11‚ 12‚ 14‚ 16‚ 17) 2. Describe what condition exists in water molecules to make them dipolar. The bent geometry of water molecule gives a slight overall negative charge to the side of the oxygen atom and a slight overall positive charge to the side of the hydrogen atom. This slight separation of charge gives the entire molecule an electrical polarity so water molecules are dipolar. 4. How does hydrogen bonding produce
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is high d. the per capita feeding rate of predators is reduced when their density is low e. none of the above Question 2. A copepod species (the predator‚ measured in copepods/m3 of water) feeds on algae (measured in cells/m3 of water) in freshwater lakes. Assume that the interaction is well-represented by the Lotka-Volterra predator prey model: where r = 1/week a= 0.01/copepods/week f= 0.01 copepods/prey q= 0.1/ week An experimental lake was initiated with 1000 algae cell/m3
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types of aquatic biomes: ____________________ and __________________ Check the two below. A: deep sea biome B: marine biome C: freshwater biome D: river biome 5. There are 4 major terrestrial (land) biomes. Check the two that apply. 1. Desert 2. Forest 3. ____________ 4. ____________ A: Prarieland B: Flatland C: Grassland D: Tundra 6. Why are freshwater and marine biomes the most important of all biomes? A: They are the biggest biomes. B: They have the most varied species. C: They
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popular ornamental fish with more than 200 million sold in the U.S alone • Two dozen regional wholesalers located throughout the country distribute freshwater ornamental fish to an estimated 5000 retail establishments for sale to consumers • Total sales of pet stores are increasing at an annual rate of 7% • Consumer market for freshwater ornamental fish and related products in U.S exceeds $700 million annually and is growing at a rate of 9% a year 4-Threats: • The blanket regulation
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Actinopterygii ! Infraclass Chondrostei ! Infraclass Holostei ! Infraclass Teleostei ! Subclass Sarcopterygii ! Order Crossopterygii ! Order Dipnoi examples jawless fishes hagfish lampreys jawed fishes extinct Paleozoic sharks Paleozoic freshwater sharks typical sharks skates and rays chimaeras or ratfishes various extinct fishes higher bony fishes ray-finned fishes sturgeon‚ paddlefish; primitive ray-finned fishes gars‚ bowfins; dominant ray-finned fishes of Mesozoic most bony fish; dominant
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Nuclear Energy There are many advantages and disadvantages of using nuclear power. Nuclear power is said to prevent power outages that happen in areas without nuclear power. For an example‚ if we were using hydroelectricity and the dam suddenly malfunctions‚ then we won’t have electricity until someone fixes the dam‚ and that would be difficult if it happened in the middle of the night. However‚ on the other hand‚ nuclear power is also considered toxic and it pollutes the Earth with harmful and
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UNIQUE AND THREATENED BIODIVERSITY The patchwork of isolated islands‚ the tropical location of the country‚ and the once extensive areas of rainforest have resulted in high species diversity in some groups of organisms and a very high level of endemism. There are five major and at least five minor centers of endemism‚ ranging in size from Luzon‚ the largest island (103‚000 km²)‚ which‚ for example‚ has at least 31 endemic species of mammals‚ to tiny Camiguin Island (265 km²) speck of land north
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14(1):57-72. Matz‚ C.J.‚ Treble‚ R.J.‚ and Krone‚ P.H. (2005). Accumulation and elimination of cadmium in larval stage zebrafish following acute exposure. Ecotoxicology and Environmental Safety 66:44-48. Memmert‚ U.‚ (1986). Bioaccumulation of zinc in two freshwater organisms (Daphnia magna‚ Crustacea and Brachydanio rerio‚ Pisces). Water Research 21(1): 99-106. Misra‚ S.‚ Zafarullah‚ M.‚ Price-Haughey‚ J.‚ Gedamu‚ L. 1988. Analysis of stress induced gene expression in fish cell lines exposed to heavy metals
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WWF’s mission………………………………………………………7 2.3. WWF guiding principles……………………………………………8 3. Danube-Carpathian Region………………………………………………….9 3.1. WWF Danube-Carpathian Programme……………………………...10 3.2. WWF solutions……………………………………………………...11 3.2.1. Danube/Freshwater Programme…………………………..…..11 3.2.2. Carpathians/Forests & Protected Areas ……………………..12 3.2.3. Green Public Funds…………………………………………..13 3.2.4. Climate Change……………………………………………….14 Conclusion……………………………………………………….…………..……16 INTRODUCTION
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The world’s population is growing at 1.1 per cent per year‚ having surpassed 7 billion people in late 2011. It is expected to rise to 9.1 billion people by 2050. This growth is unprecedented and is being felt mainly in the developing world. Due to the unprecedented growth rates being experienced and uneven distribution of population growth occurring it is resulting in huge amounts of pressure on the natural environment‚ drastic global inequalities and is affecting age structure and employment in
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