WGU C190 Intro to Biology - Unit 1 Questions With Correct Answers!!

Abiotic - Non-living, may be within or made by a living organism. Biotic - Living. Matter is considered ______ if it was ever alive at some point in time Atom - Smallest level. The basic unit of matter. Consists of a dense nucleus surrounded by electrons. Molecule - Second level. A chemical structure consisting of at least two atoms held together by a chemical bond. Macromolecule - Third level. Biologically important molecules that are technically polymers. Example: DNA. Cell - Fourth level. The fundamental unit of life. Essentially a tiny droplet of water and other molecules enclosed by a fluid "skin" or membrane. The smallest and simplest entity that possesses all the characteristics of life. Organelle - Fifth level. Compartments inside the cell that contain specific groups of macromolecules and carry out specific cellular functions. it encloses the DNA within the cell. Microorganism - Sixth level. Single-celled life form. Consists of just one cell and include unicellular organisms such as bacteria and protists. Tissue - Seventh level. Formed when similar cells work together to fulfill the same detailed function. Organ - Eighth level. Collections of tissues that work together to carry out a common general function. Present not only in higher level animals but also in plants.Organ System - Ninth level. Consists of functionally related organs. Mammals have many. Organism - Tenth Level. Individual living entities that survive and reproduce as a unit. For example, each tree in a forest