NLN NEX EXAM REVIEW QUESTIONS WITH
ACCURATE SOLUTIONS 2026
▶ Genus. Answer: A group of similar species
▶ Microbiology. Answer: the study of organisms that are too small to be
studied by the naked eye.
▶ Pathogens. Answer: Microorganisms that can cause disease.
▶ Microorganisms groups. Answer: Bacteria, Fungi (yeasts & molds),
protozoa, virus, and algae
▶ protozoa. Answer: Are single cell organisms, and lack a cell wall. The
study of protozoa is protozoology.
▶ Bacteria. Answer: single celled organisms with a cell wall, but no
nucleus or organelles. The study of bacteria is bacteriology.
▶ Virus. Answer: Consists of DNA or RNA surrounded by protein. The
study of a virus is virology
▶ Fungi. Answer: May be single or multi-cellular. They are composed of a
nucleus and organelles surrounded by a cell membrane, and surrounding
that is a cell wall. The stidy of fungi is mycology
▶ Algae. Answer: May be microscopic or extremely large. May be single or
multicellular, contains a nucleus. The study of algae is phycology.
▶ Autotrophs. Answer: Organisms that produce their own food from
inorganic substances.
▶ Heterotrophs. Answer: Obtain their food by consuming plants or other
animals
▶ Primary consumers. Answer: May be Herbivores or Omnivores
, ▶ Secondary consumers. Answer: Are carnivores or omnivores that eat
herbivores.
▶ Teritary consumers. Answer: Carnivores that eat other carnivores or
omnivores.
▶ Trophic level. Answer: Each step in a food chain or food web
▶ Food chain. Answer: Path along which food is transferred from level to
level.
▶ Food web. Answer: The interrelationship between the food chains.
▶ Decomposer. Answer: Consumer nonliving organic material and
releases inorganic material.
▶ Biotic Factors. Answer: Living parts of the ecosystem that affect an
ecosystem.
▶ Abiotic Factor. Answer: Nonliving influences, such as temperature,
affect an ecosystem.
▶ Symbiosis. Answer: Separate species living together.
▶ Parasitism. Answer: One species benefits, and the other species are
harmed.
▶ Commensalism. Answer: One species benefit while the other is
unharmed
▶ Mutualism. Answer: both species benefit
▶ Biosphere. Answer: The entire portion of our planet that is inhibited by
living things in a variety of ecosystems and communities.
▶ biomes. Answer: A community of living organisms of a single major
ecological region.
ACCURATE SOLUTIONS 2026
▶ Genus. Answer: A group of similar species
▶ Microbiology. Answer: the study of organisms that are too small to be
studied by the naked eye.
▶ Pathogens. Answer: Microorganisms that can cause disease.
▶ Microorganisms groups. Answer: Bacteria, Fungi (yeasts & molds),
protozoa, virus, and algae
▶ protozoa. Answer: Are single cell organisms, and lack a cell wall. The
study of protozoa is protozoology.
▶ Bacteria. Answer: single celled organisms with a cell wall, but no
nucleus or organelles. The study of bacteria is bacteriology.
▶ Virus. Answer: Consists of DNA or RNA surrounded by protein. The
study of a virus is virology
▶ Fungi. Answer: May be single or multi-cellular. They are composed of a
nucleus and organelles surrounded by a cell membrane, and surrounding
that is a cell wall. The stidy of fungi is mycology
▶ Algae. Answer: May be microscopic or extremely large. May be single or
multicellular, contains a nucleus. The study of algae is phycology.
▶ Autotrophs. Answer: Organisms that produce their own food from
inorganic substances.
▶ Heterotrophs. Answer: Obtain their food by consuming plants or other
animals
▶ Primary consumers. Answer: May be Herbivores or Omnivores
, ▶ Secondary consumers. Answer: Are carnivores or omnivores that eat
herbivores.
▶ Teritary consumers. Answer: Carnivores that eat other carnivores or
omnivores.
▶ Trophic level. Answer: Each step in a food chain or food web
▶ Food chain. Answer: Path along which food is transferred from level to
level.
▶ Food web. Answer: The interrelationship between the food chains.
▶ Decomposer. Answer: Consumer nonliving organic material and
releases inorganic material.
▶ Biotic Factors. Answer: Living parts of the ecosystem that affect an
ecosystem.
▶ Abiotic Factor. Answer: Nonliving influences, such as temperature,
affect an ecosystem.
▶ Symbiosis. Answer: Separate species living together.
▶ Parasitism. Answer: One species benefits, and the other species are
harmed.
▶ Commensalism. Answer: One species benefit while the other is
unharmed
▶ Mutualism. Answer: both species benefit
▶ Biosphere. Answer: The entire portion of our planet that is inhibited by
living things in a variety of ecosystems and communities.
▶ biomes. Answer: A community of living organisms of a single major
ecological region.
