Biology Placement Test 61 Questions And Answers
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What defines living organisms separate from non-living things?
Living 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.
Involves observing and asking questions, making inferences and forming hypotheses, conducting controlled experiments, collecting and analyzing data, and drawing conclusions
What are atoms?
The basic units of matter
What are atoms made of?
Made of protons, neutrons, and electrons
How do we define and recognize one type of atom from another?
By looking at the number of protons in the nucleus
How are atoms held together into molecules?
They 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.
Van 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?
Water is a polar molecule and it is able to form multiple hydrogen bonds
How do the properties of water benefit living organisms?
Water 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?
Prokaryotic and eukaryotic cells