WGU C190 Introduction to Biology Final
Exam Questions and 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. One of these organelles is the
nucleus; 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.
Population ✅Eleventh level. Consists of all the individuals of a species living within a
specific area.
,Community ✅Twelfth level. Populations can interact with each other in positive and
negative ways, and together they form this.
Ecosystem ✅Thirteenth level. Consists of all the living things in a particular area
together with the abiotic, or nonliving, parts of that environment.
Biosphere ✅Fourteenth level. The highest level of organization in living systems. The
collection of all ecosystems on Earth. Includes all habitable zones on the planet,
including land, soil, and rocks to a great depth in the Earth's crust; water and ice; and
the atmosphere to a great height.
Emergent Properties ✅Characteristics of a system that are not present in any of its
component parts.
Biology ✅The scientific study of life and is the branch of science that studies living
organisms and the way organisms interact with their environments.
Homeostasis ✅The ability or tendency of organisms and cells to maintain stable
internal conditions.
Nutrient ✅Any matter an organism needs but cannot make for itself.
Energy ✅The capacity to do work or to make a change in the location, temperature, or
structure of matter. Does not have mass and it does not take up space, but it can be
measured in terms of what it does.
Growth ✅An increase in size.
Development ✅Structure and function change in an orderly way as an organism
passes through its life cycle. An individual's pattern of _______ is partly determined by
genetic instructions.
Reproduction ✅Occurs when an individual organism passes on its genetic information
to a newly independent organism, or offspring.
Evolution ✅A scientific theory that explains how and why life changes over time.
Provides the explanation for why all living organisms share profound similarities, and
yet, the life forms on our planet are so incredibly diverse.
Natural Selection ✅Individuals are always a bit different from their parents and from
each other, partly because of changes to their genes. These differences may be helpful
or harmful to the individuals that inherit them. In nature, individuals often have very low
odds of surviving to reproduce. Individuals with slightly harmful or even average
, characteristics might be less likely to make it, and those with traits that fit in very well
with the local habitat will have the greatest chance to survive and reproduce. This
sorting process goes on generation after generation.
Atomic Mass ✅The sum of the number of protons and the number of neutrons. The
mass of an atom.
Atomic Number ✅The number of protons in an atom, displayed for each atom in the
periodic table.
Chemical Bonds ✅Attractions between atoms that hold atoms and molecules together.
Covalent Bonds ✅Strongest chemical bond. Occurs between atoms of in the same
molecule. Electron pairs are shared, creating a strong bond between atoms.
electron ✅Subatomic particle, located in shells on the outside of the nucleus, has a
negative charge and almost no mass.
electronegativity ✅A measure of the tendency of an atom to attract a bonding pair of
electrons. How strongly does an atoms attract bonding electrons to itself?
element ✅Atoms with unique properties, designated by the atomic number.
hydrogen bond ✅Weak chemical bond. Occurs between atoms in different molecules
or parts of molecules. Weak electrostatic attraction between areas of molecules with
opposite partial charges.
ion ✅Positively or negatively charged atom.
ionic bond ✅Moderately strong chemical bond. Occurs between atoms in the same
molecule. Electrons transfer from one atom to another.
isotope ✅Any or two or more forms of a chemical element, having the same number of
protons in the nucleus, or the same atomic number, but having different numbers of
neutrons in the nucleus, or different atomic weights.
matter ✅Anything that occupies space and has mass.
molecular formula ✅A formula giving the number of atoms of each of the elements
present in one molecule of a specific compound.
neutron ✅Subatomic particle, electrically neutral, located in the nucleus. Mass of one
amu
Exam Questions and 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. One of these organelles is the
nucleus; 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.
Population ✅Eleventh level. Consists of all the individuals of a species living within a
specific area.
,Community ✅Twelfth level. Populations can interact with each other in positive and
negative ways, and together they form this.
Ecosystem ✅Thirteenth level. Consists of all the living things in a particular area
together with the abiotic, or nonliving, parts of that environment.
Biosphere ✅Fourteenth level. The highest level of organization in living systems. The
collection of all ecosystems on Earth. Includes all habitable zones on the planet,
including land, soil, and rocks to a great depth in the Earth's crust; water and ice; and
the atmosphere to a great height.
Emergent Properties ✅Characteristics of a system that are not present in any of its
component parts.
Biology ✅The scientific study of life and is the branch of science that studies living
organisms and the way organisms interact with their environments.
Homeostasis ✅The ability or tendency of organisms and cells to maintain stable
internal conditions.
Nutrient ✅Any matter an organism needs but cannot make for itself.
Energy ✅The capacity to do work or to make a change in the location, temperature, or
structure of matter. Does not have mass and it does not take up space, but it can be
measured in terms of what it does.
Growth ✅An increase in size.
Development ✅Structure and function change in an orderly way as an organism
passes through its life cycle. An individual's pattern of _______ is partly determined by
genetic instructions.
Reproduction ✅Occurs when an individual organism passes on its genetic information
to a newly independent organism, or offspring.
Evolution ✅A scientific theory that explains how and why life changes over time.
Provides the explanation for why all living organisms share profound similarities, and
yet, the life forms on our planet are so incredibly diverse.
Natural Selection ✅Individuals are always a bit different from their parents and from
each other, partly because of changes to their genes. These differences may be helpful
or harmful to the individuals that inherit them. In nature, individuals often have very low
odds of surviving to reproduce. Individuals with slightly harmful or even average
, characteristics might be less likely to make it, and those with traits that fit in very well
with the local habitat will have the greatest chance to survive and reproduce. This
sorting process goes on generation after generation.
Atomic Mass ✅The sum of the number of protons and the number of neutrons. The
mass of an atom.
Atomic Number ✅The number of protons in an atom, displayed for each atom in the
periodic table.
Chemical Bonds ✅Attractions between atoms that hold atoms and molecules together.
Covalent Bonds ✅Strongest chemical bond. Occurs between atoms of in the same
molecule. Electron pairs are shared, creating a strong bond between atoms.
electron ✅Subatomic particle, located in shells on the outside of the nucleus, has a
negative charge and almost no mass.
electronegativity ✅A measure of the tendency of an atom to attract a bonding pair of
electrons. How strongly does an atoms attract bonding electrons to itself?
element ✅Atoms with unique properties, designated by the atomic number.
hydrogen bond ✅Weak chemical bond. Occurs between atoms in different molecules
or parts of molecules. Weak electrostatic attraction between areas of molecules with
opposite partial charges.
ion ✅Positively or negatively charged atom.
ionic bond ✅Moderately strong chemical bond. Occurs between atoms in the same
molecule. Electrons transfer from one atom to another.
isotope ✅Any or two or more forms of a chemical element, having the same number of
protons in the nucleus, or the same atomic number, but having different numbers of
neutrons in the nucleus, or different atomic weights.
matter ✅Anything that occupies space and has mass.
molecular formula ✅A formula giving the number of atoms of each of the elements
present in one molecule of a specific compound.
neutron ✅Subatomic particle, electrically neutral, located in the nucleus. Mass of one
amu
