2025 USABO Open Exam study guide
COMPLETE EXAM Questions and
Answers (Verified Answers) (Latest
Update 2025)
Animal development lab - ANSWER ✓ Research facility studying embryonic and
post-embryonic development in animals.
Sea urchin - ANSWER ✓ Marine echinoderm with a spherical body enclosed in a
rigid shell of spines.
CRISPR/Cas9 - ANSWER ✓ Genome editing technology used to alter DNA
sequences and modify gene function.
Lateral line - ANSWER ✓ Sensory system in aquatic vertebrates detecting
movement and vibration in the surrounding water.
Prolactinoma - ANSWER ✓ Benign tumor of the pituitary gland causing
excessive prolactin secretion.
Drosophila - ANSWER ✓ Genus of small flies commonly used in genetic
research.
Triacylglycerols - ANSWER ✓ Molecules consisting of three fatty acids esterified
to a glycerol backbone.
Effective population size - ANSWER ✓ Number of individuals in a population
contributing offspring to the next generation.
Gross production efficiency - ANSWER ✓ Ratio of assimilated energy to total
energy intake.
Bacteria - ANSWER ✓ Prokaryotic microorganisms with peptidoglycan cell
walls.
COMPLETE EXAM Questions and
Answers (Verified Answers) (Latest
Update 2025)
Animal development lab - ANSWER ✓ Research facility studying embryonic and
post-embryonic development in animals.
Sea urchin - ANSWER ✓ Marine echinoderm with a spherical body enclosed in a
rigid shell of spines.
CRISPR/Cas9 - ANSWER ✓ Genome editing technology used to alter DNA
sequences and modify gene function.
Lateral line - ANSWER ✓ Sensory system in aquatic vertebrates detecting
movement and vibration in the surrounding water.
Prolactinoma - ANSWER ✓ Benign tumor of the pituitary gland causing
excessive prolactin secretion.
Drosophila - ANSWER ✓ Genus of small flies commonly used in genetic
research.
Triacylglycerols - ANSWER ✓ Molecules consisting of three fatty acids esterified
to a glycerol backbone.
Effective population size - ANSWER ✓ Number of individuals in a population
contributing offspring to the next generation.
Gross production efficiency - ANSWER ✓ Ratio of assimilated energy to total
energy intake.
Bacteria - ANSWER ✓ Prokaryotic microorganisms with peptidoglycan cell
walls.
