Emcc Biology FInal Study guide

Carbohydrates are composed of: - Answer- monosaccharides Oxygen has an atomic mass of 16 and an atomic number of 8. How many neutrons are present? - Answer- 8 Lipids are the only class of macromolecules that contain: - Answer- fatty acids. Science is subdivided into specific areas of study termed disciplines. These divisions are artificial but are helpful to narrow the massive scope of scientific knowledge to a manageable amount. Given what you know about each, which scientific division is likely to present the best answer to a question about how fluid dynamics affect blood pressure in mammals? - Answer- Biophysics - study of biological processes through physics The method of reasoning that uses construction of general principles by careful examination of many specific cases is called: - Answer- inductive reasoning. Egg whites consist primarily of water and the protein albumin. When you fry an egg, why does the egg white turn from clear to white? - Answer- The protein becomes denatured. The half-life of Carbon-14 is approximately 5,700 years. Using this information scientists have been able to determine the age of some artifacts left by humans. A scientist wants to know approximately how old a piece of wood was that she found on the floor in an old cave that had recently been discovered. She removed the wood (with permission) to her laboratory. Her wood sample contained 2 grams of Carbon-14. If the age of the wood was determined to be 22,800 years old, how much Carbon-14 originally existed in this piece of wood? - Answer- 32 grams Regardless of its shape, a given orbital may contain no more than: - Answer- 2 electrons You explain to your study group that a hypothesis is: - Answer- an explanation that accounts for careful observations. Why is it necessary to take special safety precautions when using radioactivity? - Answer- Radioactive substances have the potential to cause damage to living cells. The common basilisk lizard will run across water on its hind legs in an erect position when startled by predators. This lizard has large feet and flaps of skin along its toes. What properties of water allow this lizard to walk on water? - Answer- The surface tension created by hydrogen bonds is greater than the weight of the lizard initially.