BIO 172 EXAM 1 WITH 100%
CORRECT ANSWERS 2026
Properties of Life correct answer 1) Order
2) Energy Utilization
3) Regulation or Homeostasis
4) Response to Environment
5) Reproduction
6) Evolution and Adaption
7) Growth and Development
Cell correct answer lowest level in hierarchy of biological
organization
stores & transmits information
Theory of Evolution correct answer All species are related by
decent from a common ancestor
Natural Selection correct answer Individuals with heritable
traits must survive and reproduce better than individuals with
other traits
Tree of Life correct answer A diagram depicting the
genealogical relationships of all living organisms on Earth, with a
single ancestral species at the base.
,Archea correct answer Domain of prokaryotic organisms that
are biochemically and genetically distinct from bacteria.
Eukaryotes correct answer Cells that contain nuclei
Prokaryotes correct answer Cells that do not contain nuclei
Extremophiles correct answer A prokaryote that lives in an
extreme environment.
Thermophile correct answer A group of Archae that thrive in
very hot places.
Acidophiles correct answer Acid Lover Archaea
Halophile correct answer "salt-loving" archaea that live in
environments that have very high salt concentrations
Cell Theory correct answer 1) Cells are structural units of life
2) Cells are the functional unit of life
3) All cells are fundamentally similar. Specific cell functions vary
4) All cells come from pre-existing cells
Fact correct answer Has been repeatedly confirmed
,Hypothesis correct answer Testable statement
Law correct answer Descriptive Generalization
Theory correct answer explanation that is well-substantiated
and can incorporate facts, laws, inferences, and tested
hypotheses
Scientific Method correct answer A series of steps followed to
solve problems including collecting data, formulating a
hypothesis, testing the hypothesis, and stating conclusions.
Protons correct answer Have a positive charge
Atomic number
Found in nucleus
Contributes to atomic mass
Neutrons correct answer Has a neutral charge
Found in nucleus
Contributes to atomic mass
Electron correct answer Negative charge
Found in clouds/orbitals
Mass number correct answer the sum of the number of
neutrons and protons in an atomic nucleus
, Valence correct answer The electrons in the outermost shell
(main energy level) of an atom; these are the electrons involved
in forming bonds.
Covalent bond correct answer A chemical bond that involves
sharing a pair of electrons between atoms in a molecule
Nonpolar covalent bond correct answer A type of covalent
bond in which electrons are shared equally between two atoms of
similar electronegativity.
Polar covalent bond correct answer A covalent bond between
atoms that differ in electronegativity. The shared electrons are
pulled closer to the more electronegative atom, making it slightly
negative and the other atom slightly positive.
Hydrogen Bond correct answer A type of weak chemical bond
formed when the slightly positive hydrogen atom of a polar
covalent bond in one molecule is attracted to the slightly negative
atom of a polar covalent bond in another molecule.
Ionic Bond correct answer A chemical bond resulting from the
attraction between oppositely charged ions.
Cation correct answer Positive Ion
Anion correct answer Negative Ion
CORRECT ANSWERS 2026
Properties of Life correct answer 1) Order
2) Energy Utilization
3) Regulation or Homeostasis
4) Response to Environment
5) Reproduction
6) Evolution and Adaption
7) Growth and Development
Cell correct answer lowest level in hierarchy of biological
organization
stores & transmits information
Theory of Evolution correct answer All species are related by
decent from a common ancestor
Natural Selection correct answer Individuals with heritable
traits must survive and reproduce better than individuals with
other traits
Tree of Life correct answer A diagram depicting the
genealogical relationships of all living organisms on Earth, with a
single ancestral species at the base.
,Archea correct answer Domain of prokaryotic organisms that
are biochemically and genetically distinct from bacteria.
Eukaryotes correct answer Cells that contain nuclei
Prokaryotes correct answer Cells that do not contain nuclei
Extremophiles correct answer A prokaryote that lives in an
extreme environment.
Thermophile correct answer A group of Archae that thrive in
very hot places.
Acidophiles correct answer Acid Lover Archaea
Halophile correct answer "salt-loving" archaea that live in
environments that have very high salt concentrations
Cell Theory correct answer 1) Cells are structural units of life
2) Cells are the functional unit of life
3) All cells are fundamentally similar. Specific cell functions vary
4) All cells come from pre-existing cells
Fact correct answer Has been repeatedly confirmed
,Hypothesis correct answer Testable statement
Law correct answer Descriptive Generalization
Theory correct answer explanation that is well-substantiated
and can incorporate facts, laws, inferences, and tested
hypotheses
Scientific Method correct answer A series of steps followed to
solve problems including collecting data, formulating a
hypothesis, testing the hypothesis, and stating conclusions.
Protons correct answer Have a positive charge
Atomic number
Found in nucleus
Contributes to atomic mass
Neutrons correct answer Has a neutral charge
Found in nucleus
Contributes to atomic mass
Electron correct answer Negative charge
Found in clouds/orbitals
Mass number correct answer the sum of the number of
neutrons and protons in an atomic nucleus
, Valence correct answer The electrons in the outermost shell
(main energy level) of an atom; these are the electrons involved
in forming bonds.
Covalent bond correct answer A chemical bond that involves
sharing a pair of electrons between atoms in a molecule
Nonpolar covalent bond correct answer A type of covalent
bond in which electrons are shared equally between two atoms of
similar electronegativity.
Polar covalent bond correct answer A covalent bond between
atoms that differ in electronegativity. The shared electrons are
pulled closer to the more electronegative atom, making it slightly
negative and the other atom slightly positive.
Hydrogen Bond correct answer A type of weak chemical bond
formed when the slightly positive hydrogen atom of a polar
covalent bond in one molecule is attracted to the slightly negative
atom of a polar covalent bond in another molecule.
Ionic Bond correct answer A chemical bond resulting from the
attraction between oppositely charged ions.
Cation correct answer Positive Ion
Anion correct answer Negative Ion
