WGU C190 INTRO TO BIOLOGY 2024 UPDATE
COMPREHENSIVE QUESTIONS AND CORRECT ANSWERS
ALL IN ONE DOCUMENT
(GRADED A+)
Abiotic - (correct answer) Non-living, may be within or made by a living organism.
Biotic - (correct answer) Living. Matter is considered ______ if it was ever alive at
some point in time
Atom - (correct answer) Smallest level. The basic unit of matter. Consists of a dense
nucleus surrounded by electrons.
Molecule - (correct answer) Second level. A chemical structure consisting of at least
two atoms held together by a chemical bond.
Macromolecule - (correct answer) Third level. Biologically important molecules that
are technically polymers. Example: DNA.
Cell - (correct answer) 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 - (correct answer) 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 - (correct answer) Sixth level. Single-celled life form. Consists of just
one cell and include unicellular organisms such as bacteria and protists.
Tissue - (correct answer) Seventh level. Formed when similar cells work together to
fulfill the same detailed function.
Organ - (correct answer) 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 - (correct answer) Ninth level. Consists of functionally related organs.
Mammals have many.
Organism - (correct answer) Tenth Level. Individual living entities that survive and
reproduce as a unit. For example, each tree in a forest.
Population - (correct answer) Eleventh level. Consists of all the individuals of a
species living within a specific area.
,Community - (correct answer) Twelfth level. Populations can interact with each other
in positive and negative ways, and together they form this.
Ecosystem - (correct answer) Thirteenth level. Consists of all the living things in a
particular area together with the abiotic, or nonliving, parts of that environment.
Biosphere - (correct answer) 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 - (correct answer) Characteristics of a system that are not
present in any of its component parts.
Biology - (correct answer) The scientific study of life and is the branch of science
that studies living organisms and the way organisms interact with their environments.
Homeostasis - (correct answer) The ability or tendency of organisms and cells to
maintain stable internal conditions.
Nutrient - (correct answer) Any matter an organism needs but cannot make for itself.
Energy - (correct answer) 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 - (correct answer) An increase in size.
Development - (correct answer) 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 - (correct answer) Occurs when an individual organism passes on its
genetic information to a newly independent organism, or offspring.
Evolution - (correct answer) 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 - (correct answer) 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 - (correct answer) The sum of the number of protons and the number
of neutrons. The mass of an atom.
Atomic Number - (correct answer) The number of protons in an atom, displayed for
each atom in the periodic table.
Chemical Bonds - (correct answer) Attractions between atoms that hold atoms and
molecules together.
Covalent Bonds - (correct answer) Strongest chemical bond. Occurs between atoms
of in the same molecule. Electron pairs are shared, creating a strong bond between
atoms.
electron - (correct answer) Subatomic particle, located in shells on the outside of the
nucleus, has a negative charge and almost no mass.
electronegativity - (correct answer) 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 - (correct answer) Atoms with unique properties, designated by the atomic
number.
hydrogen bond - (correct answer) 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 - (correct answer) Positively or negatively charged atom.
ionic bond - (correct answer) Moderately strong chemical bond. Occurs between
atoms in the same molecule. Electrons transfer from one atom to another.
isotope - (correct answer) 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 - (correct answer) Anything that occupies space and has mass.
molecular formula - (correct answer) A formula giving the number of atoms of each
of the elements present in one molecule of a specific compound.
neutron - (correct answer) Subatomic particle, electrically neutral, located in the
nucleus. Mass of one amu
COMPREHENSIVE QUESTIONS AND CORRECT ANSWERS
ALL IN ONE DOCUMENT
(GRADED A+)
Abiotic - (correct answer) Non-living, may be within or made by a living organism.
Biotic - (correct answer) Living. Matter is considered ______ if it was ever alive at
some point in time
Atom - (correct answer) Smallest level. The basic unit of matter. Consists of a dense
nucleus surrounded by electrons.
Molecule - (correct answer) Second level. A chemical structure consisting of at least
two atoms held together by a chemical bond.
Macromolecule - (correct answer) Third level. Biologically important molecules that
are technically polymers. Example: DNA.
Cell - (correct answer) 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 - (correct answer) 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 - (correct answer) Sixth level. Single-celled life form. Consists of just
one cell and include unicellular organisms such as bacteria and protists.
Tissue - (correct answer) Seventh level. Formed when similar cells work together to
fulfill the same detailed function.
Organ - (correct answer) 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 - (correct answer) Ninth level. Consists of functionally related organs.
Mammals have many.
Organism - (correct answer) Tenth Level. Individual living entities that survive and
reproduce as a unit. For example, each tree in a forest.
Population - (correct answer) Eleventh level. Consists of all the individuals of a
species living within a specific area.
,Community - (correct answer) Twelfth level. Populations can interact with each other
in positive and negative ways, and together they form this.
Ecosystem - (correct answer) Thirteenth level. Consists of all the living things in a
particular area together with the abiotic, or nonliving, parts of that environment.
Biosphere - (correct answer) 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 - (correct answer) Characteristics of a system that are not
present in any of its component parts.
Biology - (correct answer) The scientific study of life and is the branch of science
that studies living organisms and the way organisms interact with their environments.
Homeostasis - (correct answer) The ability or tendency of organisms and cells to
maintain stable internal conditions.
Nutrient - (correct answer) Any matter an organism needs but cannot make for itself.
Energy - (correct answer) 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 - (correct answer) An increase in size.
Development - (correct answer) 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 - (correct answer) Occurs when an individual organism passes on its
genetic information to a newly independent organism, or offspring.
Evolution - (correct answer) 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 - (correct answer) 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 - (correct answer) The sum of the number of protons and the number
of neutrons. The mass of an atom.
Atomic Number - (correct answer) The number of protons in an atom, displayed for
each atom in the periodic table.
Chemical Bonds - (correct answer) Attractions between atoms that hold atoms and
molecules together.
Covalent Bonds - (correct answer) Strongest chemical bond. Occurs between atoms
of in the same molecule. Electron pairs are shared, creating a strong bond between
atoms.
electron - (correct answer) Subatomic particle, located in shells on the outside of the
nucleus, has a negative charge and almost no mass.
electronegativity - (correct answer) 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 - (correct answer) Atoms with unique properties, designated by the atomic
number.
hydrogen bond - (correct answer) 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 - (correct answer) Positively or negatively charged atom.
ionic bond - (correct answer) Moderately strong chemical bond. Occurs between
atoms in the same molecule. Electrons transfer from one atom to another.
isotope - (correct answer) 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 - (correct answer) Anything that occupies space and has mass.
molecular formula - (correct answer) A formula giving the number of atoms of each
of the elements present in one molecule of a specific compound.
neutron - (correct answer) Subatomic particle, electrically neutral, located in the
nucleus. Mass of one amu
