HESI A2 BIOLOGY ACTUAL PRACTICE TEST
QUESTIONS AND VERIFIED SOLUTIONS 2026
◉ species. Answer: most restrictive category
◉ hierarchic organizational system. Answer: kingdom, phylum,
class, order, family, genius, species
◉ steps to an experiment. Answer: 1. observation
2. hypothesis
3. experiment
4. conclusion
◉ observation. Answer: data is observed and recorded/ previous
data is studied
◉ hypothesis. Answer: a statement or explanation of certain events
or happenings
◉ experiment. Answer: repeatable procedure of gathering data to
support or refute the hypothesis
,◉ conclusion. Answer: where the data and its significance are fully
explained
◉ aqueous. Answer: water based
◉ water molecule consists of. Answer: two hydrogen atoms
covalently bonded to one oxygen atom
◉ most significant aspect of water is. Answer: the polarity of its
bonds that allows for hydrogen bonding between molecules
◉ specific heat. Answer: 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. Answer: 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. Answer: 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. Answer: 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. Answer: lattice crystals; causing the
molecules to spread apart, resulting in the phenomenon of ice
floating
◉ polarity of water allows it to act as an. Answer: versatile solvent
(used to dissolve a number of different solvents)
◉ carbohydrates. Answer: longs chains, or polymers of sugar
-used for storage, structure, and energy
-the backbone of important molecules such as DNA and RNA
◉ lipids. Answer: known as fats, but specifically they are fatty acids,
phospholipids, and steroids
◉ fatty acids. Answer: Vary greatly but simply are grouped into two
categories: saturated and unsaturated
◉ saturated fats. Answer: contain no double bonds in their hydrogen
tail
-solids at room temp
QUESTIONS AND VERIFIED SOLUTIONS 2026
◉ species. Answer: most restrictive category
◉ hierarchic organizational system. Answer: kingdom, phylum,
class, order, family, genius, species
◉ steps to an experiment. Answer: 1. observation
2. hypothesis
3. experiment
4. conclusion
◉ observation. Answer: data is observed and recorded/ previous
data is studied
◉ hypothesis. Answer: a statement or explanation of certain events
or happenings
◉ experiment. Answer: repeatable procedure of gathering data to
support or refute the hypothesis
,◉ conclusion. Answer: where the data and its significance are fully
explained
◉ aqueous. Answer: water based
◉ water molecule consists of. Answer: two hydrogen atoms
covalently bonded to one oxygen atom
◉ most significant aspect of water is. Answer: the polarity of its
bonds that allows for hydrogen bonding between molecules
◉ specific heat. Answer: 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. Answer: 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. Answer: 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. Answer: 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. Answer: lattice crystals; causing the
molecules to spread apart, resulting in the phenomenon of ice
floating
◉ polarity of water allows it to act as an. Answer: versatile solvent
(used to dissolve a number of different solvents)
◉ carbohydrates. Answer: longs chains, or polymers of sugar
-used for storage, structure, and energy
-the backbone of important molecules such as DNA and RNA
◉ lipids. Answer: known as fats, but specifically they are fatty acids,
phospholipids, and steroids
◉ fatty acids. Answer: Vary greatly but simply are grouped into two
categories: saturated and unsaturated
◉ saturated fats. Answer: contain no double bonds in their hydrogen
tail
-solids at room temp
