BIOLOGY 101 FINAL STUDY GUIDE 2026
COMPLETE QUESTIONS AND
ANSWERS.
▶ Three Domains. Answer: Bacteria, Archaea, Eukarya
▶ Science. Answer: organized way of gathering and analyzing
evidence about the natural world
▶ Molecule. Answer: 2 or more elements bonded together
▶ How many naturally occurring elements are there?. Answer: 92
▶ most common elements in life. Answer: carbon, hydrogen,
oxygen, nitrogen
▶ How many elements humans need to live. Answer: 25
▶ How many elements plants need to live. Answer: 27
▶ atomic number. Answer: the number of protons in an atom
▶ atomic mass. Answer: Number of protons and neutrons
, ▶ covalent bond. Answer: A chemical bond formed when two atoms
share electrons
▶ polar covalent bond. Answer: unequal sharing of electrons
▶ nonpolar covalent bond. Answer: a covalent bond in which the
electrons are shared equally by the two atoms
▶ ionic bond. Answer: Formed when one or more electrons are
transferred from one atom to another
▶ Electronegativity. Answer: the affinity for atoms to attract
electrons
▶ chemical reaction. Answer: making and breaking of bonds
▶ Photosynthesis formula. Answer: 6CO2 + 6H2O + light -->
C6H12O6 + 6O2
▶ life supporting properties of water. Answer: cohesion
moderation of temperature
floating of ice on liquid water
solvent of life
COMPLETE QUESTIONS AND
ANSWERS.
▶ Three Domains. Answer: Bacteria, Archaea, Eukarya
▶ Science. Answer: organized way of gathering and analyzing
evidence about the natural world
▶ Molecule. Answer: 2 or more elements bonded together
▶ How many naturally occurring elements are there?. Answer: 92
▶ most common elements in life. Answer: carbon, hydrogen,
oxygen, nitrogen
▶ How many elements humans need to live. Answer: 25
▶ How many elements plants need to live. Answer: 27
▶ atomic number. Answer: the number of protons in an atom
▶ atomic mass. Answer: Number of protons and neutrons
, ▶ covalent bond. Answer: A chemical bond formed when two atoms
share electrons
▶ polar covalent bond. Answer: unequal sharing of electrons
▶ nonpolar covalent bond. Answer: a covalent bond in which the
electrons are shared equally by the two atoms
▶ ionic bond. Answer: Formed when one or more electrons are
transferred from one atom to another
▶ Electronegativity. Answer: the affinity for atoms to attract
electrons
▶ chemical reaction. Answer: making and breaking of bonds
▶ Photosynthesis formula. Answer: 6CO2 + 6H2O + light -->
C6H12O6 + 6O2
▶ life supporting properties of water. Answer: cohesion
moderation of temperature
floating of ice on liquid water
solvent of life