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bio test 1 - BIOL114,EXAMI,F06 NAME 1 All adaptations no...

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BIOL114,EXAMI,F06 NAME 1. All adaptations, no matter if they are a behavior, an anatomical feature, a physiological ability, or a biochemical pathway, have one very important thing in common. What is that? 2. What is the single most important distinction that can be made between prokaryotic and eukaryotic cells? 3. What are two important differences between a well-tested hypothesis and a theory? 4. Describe the relationship (differentiate) between orbitals and energy shells, (what, where, how many, etc.) 5. When an electron moves between orbitals within a shell ..... a. no energy is gained or lost b. energy is released c. energy is gained d. none of the above 6. Beryllium has two electrons in the 2nd energy shell. How many bonds can it make? 7. Match the term with the appropriate description. element atom molecule compound 8. How do isotopes of the same element differ? 9. What is the valence of ....... an atom of carbon with an atomic number of 8 an atom with a mass number of 14 an atom with 7 electrons in the 2nd energy shell 10. Match the term with the appropriate bond description. polar covalent strong, no difference in electronegativity between atoms nonpolar covalent weak, charge attraction between different molecules 1
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ionic weak, hydrophobic attraction and charge differences usually on same large molecule hydrogen strong, high electronegativity strips electrons, large charge difference attracts atoms Van der Waal strong, unequal sharing due to electronegativity 11. Water has special properties. Explain how the special properties arise from the interactions between oxygen and hydrogen. 12. Give one example of something you can observe that is caused by water's cohesion. 13. Water is a much more effective evaporative coolant because of its H-bonds. Explain how H- bonds increase the cooling effects of evaporation. 14. What is the molar concentration of H + ions in a solution with pH = 4.
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