Biology 103 Exam 1 Practice Questions with Correct Answers

What are the characteristics of all living things? organization, acquisition of materials and energy, homeostasis, response, reproduction and development, adaptable What is the smallest unit of life cell what is a metabolism all reactions in a cell · What are the levels of organization of living things (in the right order from least to largest)? Atom, molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere What is an atom Smallest particle of an element what is a molecule Union of two or more atoms of same or different elements What is a cell Structural and functional unit of all living things What is a tissue? Group of cells with common structure and function What is an organ? Tissues functioning together for a specific purpose What is an organ system? a group of organs working together what is an organism An individual living thing, contain organ systems What does food provide? nutrients and energy What is a nutrient? vitamins and minerals