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C190 - INTRODUCTION TO BIOLOGY WGU - UNIT 1: MODULES 1 2 & 3 EXAM 2025 QUESTIONS AND ANSWERS Matter - ....ANSWER ...-Any substance that has mass and takes up space 2 classes of matter - ....ANSWER ...-biotic (living/have lived) abiotic (nonliving/never alive) The basic unit of matter - ....ANSWER ...-the atom The atom is made up of: - ....ANSWER ...-a dense nucleus surrounded by electrons Atoms join together and form: - ....ANSWER Molecules consist of: - ....ANSWER ...-molecules ...-at least two atoms held together by a chemical bond Macromolecules are: - ....ANSWER ...-biologically important molecules AKA polymers Polymers are made by: - ....ANSWER ...-combining smaller units called monomers (simpler macromolecules) Macromolecule example: - ....ANSWER ...-DNA (built of 4 kinds of monomers (nucleotides) strung together (polymerized) in a sequence that codes for structure of proteins and other bio molecules.) ...COPYRIGHT ©️ 2025, ALL RIGHTS RESERVED..... 100% PASS RATE 1