Biology Placement Test with 100% Correct Answers

Biology Placement Test with 100% Correct Answers What defines living organisms separate from non-living things? - answerLiving things are made up of basic units called cells, are based on a universal genetic code, obtain and use materials and energy, grow and develop, reproduce, respond to their environment, maintain a stable internal environment, and change over time Discuss the scientific method and its use in acquiring knowledge. - answerInvolves observing and asking questions, making inferences and forming hypotheses, conducting controlled experiments, collecting and analyzing data, and drawing conclusions What are atoms? - answerThe basic units of matter What are atoms made of? - answerMade of protons, neutrons, and electrons How do we define and recognize one type of atom from another? - answerBy looking at the number of protons in the nucleus How are atoms held together into molecules? - answerThey attach to other atoms to make a covalent bond. If there are 4 attached atoms, it is a double bond. If there are 6 attached atoms, it is a triple bond Discuss the structure and function of the major types of large molecules found in living organisms. - answerVan der Waals forces are a slight attraction that develops between oppositely charged regions of nearby molecules. They aren't as strong as ionic and covalent bonds, but they hold molecules together, especially the large ones What are special properties of water? - answerWater is a polar molecule and it is able to form multiple hydrogen bonds How do the properties of water benefit living organisms? - answerWater is the best solvent on Earth. It is able to dissolve both ionic compounds and other polar molecules What are the two different types of cells found in living organisms? - answerProkaryotic and eukaryotic cells How are prokaryotic and eukaryotic cells different? - answerProkaryotic cells don't have a nucleus and eukaryotic cells have a nucleus, where they separate the genetic information from the rest of the cell Organelles - answerMany of the structures in cells; called "little organs" Cytoplasm - answerThe portion of the cell outside the nucleus Vacuoles - answerStore materials like water, salts, proteins, and carbohydrates Lysosomes - answerBreak down lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell. They are also involved in breaking down organelles that have outlived their usefulness Cytoskeleton - answerHelps the cell maintain its shape and is also involved in movement Microfilaments - answerThreadlike str