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TEAS Practice Test Science Portion Questions and Verified Answers (2026–2027) | Complete ATI TEAS Science Exam Prep | Grade A+

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Prepare for the ATI TEAS Science section with this comprehensive Study Guide featuring Questions and Verified Answers. This resource includes realistic multiple-choice practice questions covering human anatomy and physiology, biology, chemistry, scientific reasoning, genetics, cell biology, microbiology, life sciences, body systems, nutrition, metabolism, homeostasis, laboratory concepts, scientific investigation, and foundational health science principles. Designed for students preparing for the ATI TEAS 7 nursing school entrance examination and other allied health admissions tests, this study guide helps reinforce essential science concepts, strengthen analytical and critical-thinking skills, improve exam readiness, and build confidence for success on the TEAS Science section and nursing program admissions.

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TEAS Practice Test Science Portion | ATI TEAS Science Exam Prep
Breakdown of what begins in the small intestine? Fats
a) protein
b) fats
c) fiber
d) carbohydrates


In geology, what is considered a significant departure A paradigm shift
from previous ideas?
a) ideology
b) theoretical refinement
c) a paradigm shift
d) model adjustment


What describes the increase in alleles that permits a Adaptation
species to survive and reproduce better in an
environment from generation to generation?
a) DNA
b) Genetic drift
c) Mutation
d) adaptation


What nervous systems directs the bodies flight or flight Sympathetic
response?
a) peripheral
b) central
c) parasympathetic
d) sympathetic


What is used in quantitative investigations? Numerical information
a) sensory information
b) numerical information
c) phenomenological research
d) ethnographic research


Which of the following taxonomic ranks is the most Phylum
general? Order, genus, phylum, family
a) order
b) genus
c) phylum
d) family


Water undergoes relatively minor temperature and phase High specific heat and high heat of vaporization
changes compared to other substances due to both its
what?
a) low specific heat and low vaporization
b) low specific heat and high heat vaporization
c) high specific heat and low heat of vaporization
d) high specific heat and high heat of vaporization


What is an example of hydrocarbons containing double C4H8
bonds?
a) C2H6
b) C4H8
c) C6H10
d) C8H12


What represents the correct order of scientific process? Hypothesis, data, analysis
a) hypothesis, data, analysis
b) hypothesis, analysis, data
c) data, hypothesis, analysis
d) data, analysis, hypothesis


What organ system supplies the body cells with oxygen Cardiovascular
and nutrients?
a) cardiovascular
b) digestive
c) nervous
d) immune

, TEAS Practice Test Science Portion | ATI TEAS Science Exam Prep
Through what does blood pass after leaving the right Pulmonary artery
ventricle during contraction of the heart?
a) aorta
b) pulmonary artery
c) vena cava
d) mitral valve


What organ system supplies the body with oxygen and Respiratory
removes carbon dioxide?
a) integumentary
b) endocrine
c) respiratory
d) renal


What is responsible for the peristalsis that occurs in the Smooth muscle
digestive tract?
a) smooth muscle
b) skeletal muscle
c) connective tissue
d) subcutaneous tissue


A proton should have what two characteristics when An opposite charge and a larger mass
compared to the charge and the mass of an electron?
a) the same charge and the same mass
b) the same charge and larger mass
c) an opposite charge and same mass
d) an opposite charge and larger mass


The spine is part of what system? Skeletal
a) lymphatic
b) nervous
c) skeletal
d) endocrine


If two gases (A and B) that have detectable odors and Gas B has a higher density than Gas A
the same temperature are released simultaneously on
one side of a room, and the odor of Gas A is noticed one
minute before that of Gas B, what conclusion can be
made?
a) gas A has higher density than gas B
b) gas B has higher density than gas A
c) The opening in the container of Gas A is larger than
that of Gas B
d) The opening in the container of Gas B is larger than
that of Gas A


What describes a substance that is completely ionized in Strong acid
its solution and has a pH of 2?
a) strong acid
b) strong base
c) weak acid
d) weak base


What organs are immune cells produced ? Bone marrow
a) tonsils
b) spleen
c) lymph nodes
d) bone marrow


A research student is determining the pollen count for a Multiple decimeter squares for one morning and one afternoon
24-hour period in a given location. The students data
would be most reliable if he decided to count the pollen
in what?
a) a single decimeter square for one morning and one
afternoon
b) multiple decimeter squares for one morning and one
afternoon
c) a single decimeter square for one afternoon
d) multiple decimeter squares for one afternoon

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