HESI A2 BIOLOGY EXAM QUESTIONS
AND ANSWERS | 2026 UPDATE | 100%
CORRECT.
Kingdom - ANS largest and most inclusive category
species - ANS most restrictive category
hierarchic organizational system - ANS kingdom, phylum, class, order, family, genius, species
steps to an experiment - ANS 1. observation
2. hypothesis
3. experiment
4. conclusion
observation - ANS data is observed and recorded/ previous data is studied
hypothesis - ANS a statement or explanation of certain events or happenings
experiment - ANS repeatable procedure of gathering data to support or refute the hypothesis
conclusion - ANS where the data and its significance are fully explained
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, aqueous - ANS water based
water molecule consists of - ANS two hydrogen atoms covalently bonded to one oxygen atom
most significant aspect of water is - ANS the polarity of its bonds that allows for hydrogen
bonding between molecules
specific heat - ANS the amount of heat necessary to raise the temperature of 1 gram of that
molecule 1 degree celsius
water has high specific heat due to - ANS the extent of hydrogen bonding between water
molecules, which allows waters to resist shifts in temperature (ability of oceans or large bodies
of water to stabilize climates)
cohesion - ANS the ability of a molecule to stay bonded or attracted to another molecule of
the same substance (water running together on a newly waxed car)
adhesion - ANS the ability of water to bond to or attract other molecules or substances
(when water is sprayed onto the wall, some of it sticks to the wall)
when water freezes it forms - ANS lattice crystals; causing the molecules to spread apart,
resulting in the phenomenon of ice floating
polarity of water allows it to act as an - ANS versatile solvent (used to dissolve a number of
different solvents)
carbohydrates - ANS longs chains, or polymers of sugar
-used for storage, structure, and energy
-the backbone of important molecules such as DNA and RNA
lipids - ANS known as fats, but specifically they are fatty acids, phospholipids, and steroids
@COPYRIGHT ALL RIGHTS RESERVED PAGE 2 OF 11
AND ANSWERS | 2026 UPDATE | 100%
CORRECT.
Kingdom - ANS largest and most inclusive category
species - ANS most restrictive category
hierarchic organizational system - ANS kingdom, phylum, class, order, family, genius, species
steps to an experiment - ANS 1. observation
2. hypothesis
3. experiment
4. conclusion
observation - ANS data is observed and recorded/ previous data is studied
hypothesis - ANS a statement or explanation of certain events or happenings
experiment - ANS repeatable procedure of gathering data to support or refute the hypothesis
conclusion - ANS where the data and its significance are fully explained
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 11
, aqueous - ANS water based
water molecule consists of - ANS two hydrogen atoms covalently bonded to one oxygen atom
most significant aspect of water is - ANS the polarity of its bonds that allows for hydrogen
bonding between molecules
specific heat - ANS the amount of heat necessary to raise the temperature of 1 gram of that
molecule 1 degree celsius
water has high specific heat due to - ANS the extent of hydrogen bonding between water
molecules, which allows waters to resist shifts in temperature (ability of oceans or large bodies
of water to stabilize climates)
cohesion - ANS the ability of a molecule to stay bonded or attracted to another molecule of
the same substance (water running together on a newly waxed car)
adhesion - ANS the ability of water to bond to or attract other molecules or substances
(when water is sprayed onto the wall, some of it sticks to the wall)
when water freezes it forms - ANS lattice crystals; causing the molecules to spread apart,
resulting in the phenomenon of ice floating
polarity of water allows it to act as an - ANS versatile solvent (used to dissolve a number of
different solvents)
carbohydrates - ANS longs chains, or polymers of sugar
-used for storage, structure, and energy
-the backbone of important molecules such as DNA and RNA
lipids - ANS known as fats, but specifically they are fatty acids, phospholipids, and steroids
@COPYRIGHT ALL RIGHTS RESERVED PAGE 2 OF 11
