WGU C190 Intro to Biology - Unit 1 Already Passed
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. 1 / 2
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.
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