NLN PAX Science Exam 2026/2027 –
Practice Questions, Answers & Study Guide
Which of these organisms has the most complex
digestive system?
Earthworm
Hydra
Amoeba
Planaria - correct answer-Earthworm
Which of these is an example of an emulsion?
Salt water
Hydrochloric Acid (aq)
Mayonnaise
Copper sulfate - correct answer-Mayonnaise
Which of these findings suggests a serious illness from a urinalysis?
Absence of glucose or protein.
Presence of urea and mineral salts.
, Presence of glucose and protein.
Presence of urea and absence of
glucose. - correct answer-Presence of glucose and protein
When a population is in Hardy-Weinberg
equilibrium, which of these conditions must be
present?
The population is very small
The population is isolated from other populations
Natural selections
Net mutation - correct answer-The population is isolated from other populations
The second law of thermodynamics states that
with every spontaneous process, the entropy of
the universe
increases.
decreases.
remains the same.
reverses direction. - correct answer-Increases
The Pap test can detect cancer in the female
reproductive tract at an early stage, requiring cells
scraped from
the vagina.
Practice Questions, Answers & Study Guide
Which of these organisms has the most complex
digestive system?
Earthworm
Hydra
Amoeba
Planaria - correct answer-Earthworm
Which of these is an example of an emulsion?
Salt water
Hydrochloric Acid (aq)
Mayonnaise
Copper sulfate - correct answer-Mayonnaise
Which of these findings suggests a serious illness from a urinalysis?
Absence of glucose or protein.
Presence of urea and mineral salts.
, Presence of glucose and protein.
Presence of urea and absence of
glucose. - correct answer-Presence of glucose and protein
When a population is in Hardy-Weinberg
equilibrium, which of these conditions must be
present?
The population is very small
The population is isolated from other populations
Natural selections
Net mutation - correct answer-The population is isolated from other populations
The second law of thermodynamics states that
with every spontaneous process, the entropy of
the universe
increases.
decreases.
remains the same.
reverses direction. - correct answer-Increases
The Pap test can detect cancer in the female
reproductive tract at an early stage, requiring cells
scraped from
the vagina.
