HESI A2 BIOLOGY EXAMINATION PAPER WITH
VERIFIED ANSWER KEY 2026
◉ The five kingdoms are. Answer: Monera, Protista, Fungi, Plantae,
Animalia
◉ The Monera Kingdom (Prokaryotes). Answer: includes about
10,000 known species of prokaryotes such as bacteria and
cyanobacteria. Members of this kingdom can be unicellular
organisms or colonies.
◉ Protista Kingdom. Answer: unicellular, protozoans and unicellular
and multi cellular algae.
◉ Fungi Kingdom. Answer: eukaryotic kingdom of heterotrophic
decomposers with cell walls made of chitin
◉ Three Domains. Answer: Bacteria, Archaea, Eukarya
◉ Human Classification. Answer: Domain: Eukarya
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
,Order: Primates
Family: Hominidae
Genus: Homo
Species: Sapiens
◉ binomial nomenclature. Answer: Classification system in which
each species is assigned a two-part scientific name
◉ Species. Answer: A group of similar organisms that can breed and
produce fertile offspring.
◉ Natural selection. Answer: A process in which individuals that
have certain inherited traits tend to survive and reproduce at higher
rates than other individuals because of those traits.
◉ Darwin's Four Principles. Answer: 1. From generation to
generation, there are various individuals within a species
2. Genes determine variations
3. More individuals are born than survive to maturation
4. Specific genes enable an organism to better survive
◉ Gradualism. Answer: The theory that evolution occurs slowly but
steadily
,◉ punctuated equilibrium. Answer: Pattern of evolution in which
long stable periods are interrupted by brief periods of more rapid
change
◉ stasis. Answer: long periods of no change
◉ scientific knowledge. Answer: sum of all scientific inquiries for
truths about the natural world
◉ scientific inquiry. Answer: The diverse ways in which scientists
study the natural world and propose explanations based on
evidence they gather.
◉ Scientific Method. Answer: 1. Identifying a problem or posing a
question
2. Formulating a hypothesis or an educated guess
3. Conducting experiments or tests that will provide a basis to solve
the problem or answer the question.
4. Observing the results of the test
5. Drawing conclusions
◉ Important properties of water. Answer: high polarity
, hydrogen bonding
cohesiveness
adhesiveness
high specific heat
high latent heat
high heat of vaporization
◉ Water is liquidized at. Answer: room temperature
◉ high specific heat of water. Answer: It takes a lot of energy to heat
up water, which allows for a stable environment; due to hydrogen
bonding
◉ Water is cohesive and adhesive. Answer: water is attracted to
itself due to hydrogen bonds and it is readily attracted to other
molecules.
VERIFIED ANSWER KEY 2026
◉ The five kingdoms are. Answer: Monera, Protista, Fungi, Plantae,
Animalia
◉ The Monera Kingdom (Prokaryotes). Answer: includes about
10,000 known species of prokaryotes such as bacteria and
cyanobacteria. Members of this kingdom can be unicellular
organisms or colonies.
◉ Protista Kingdom. Answer: unicellular, protozoans and unicellular
and multi cellular algae.
◉ Fungi Kingdom. Answer: eukaryotic kingdom of heterotrophic
decomposers with cell walls made of chitin
◉ Three Domains. Answer: Bacteria, Archaea, Eukarya
◉ Human Classification. Answer: Domain: Eukarya
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
,Order: Primates
Family: Hominidae
Genus: Homo
Species: Sapiens
◉ binomial nomenclature. Answer: Classification system in which
each species is assigned a two-part scientific name
◉ Species. Answer: A group of similar organisms that can breed and
produce fertile offspring.
◉ Natural selection. Answer: A process in which individuals that
have certain inherited traits tend to survive and reproduce at higher
rates than other individuals because of those traits.
◉ Darwin's Four Principles. Answer: 1. From generation to
generation, there are various individuals within a species
2. Genes determine variations
3. More individuals are born than survive to maturation
4. Specific genes enable an organism to better survive
◉ Gradualism. Answer: The theory that evolution occurs slowly but
steadily
,◉ punctuated equilibrium. Answer: Pattern of evolution in which
long stable periods are interrupted by brief periods of more rapid
change
◉ stasis. Answer: long periods of no change
◉ scientific knowledge. Answer: sum of all scientific inquiries for
truths about the natural world
◉ scientific inquiry. Answer: The diverse ways in which scientists
study the natural world and propose explanations based on
evidence they gather.
◉ Scientific Method. Answer: 1. Identifying a problem or posing a
question
2. Formulating a hypothesis or an educated guess
3. Conducting experiments or tests that will provide a basis to solve
the problem or answer the question.
4. Observing the results of the test
5. Drawing conclusions
◉ Important properties of water. Answer: high polarity
, hydrogen bonding
cohesiveness
adhesiveness
high specific heat
high latent heat
high heat of vaporization
◉ Water is liquidized at. Answer: room temperature
◉ high specific heat of water. Answer: It takes a lot of energy to heat
up water, which allows for a stable environment; due to hydrogen
bonding
◉ Water is cohesive and adhesive. Answer: water is attracted to
itself due to hydrogen bonds and it is readily attracted to other
molecules.
