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TEAS Practice Test (science portion) Questions
with Correct and Verified Answers Latest
2025 - 2026 Update Exam (Score A)100% Rated-
Western Carolina University
What describes the increase in alleles that permits a species to survive and reproduce better in an environment from generation to generation? a) DNA b) Genetic drift c) Mutation d) adaptation Adaptation What nervous systems directs the bodies flight or flight response? a) peripheral b) central c) parasympathetic d) sympathetic Sympathetic
What is used in quantitative investigations? a) sensory information b) numerical information c) phenomenological research d) ethnographic research Numerical information Which of the following taxonomic ranks is the most general? Order, genus, phylum, family a) order b) genus c) phylum d) family Phylum Water undergoes relatively minor temperature and phase 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) immune Cardiovascular Through what does blood pass after leaving the right ventricle during contraction of the heart? a) aorta b) pulmonary artery c) vena cava d) mitral valve Pulmonary artery What organ system supplies the body with oxygen and removes carbon dioxide? a) integumentary b) endocrine c) respiratory d) renal Respiratory What is responsible for the peristalsis that occurs in the digestive tract? a) smooth muscle
b) skeletal muscle c) connective tissue d) subcutaneous tissue Smooth muscle A proton should have what two characteristics when 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 An opposite charge and a larger mass The spine is part of what system? a) lymphatic b) nervous c) skeletal d) endocrine Skeletal
A research student is determining the pollen count for a 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 Multiple decimeter squares for one morning and one afternoon The heart is located ________ the sternum? a) to the right of b) to the left of c) behind d) in front of Behind Exchange of oxygen occurs in what structure of the respiratory system? a) alveoli b) bronchioles c) trachea
d) pleura Alveoli What is true of fertility rates in less developed countries? a) they are lower in less-developed countries b) they are higher in less-developed countries c) they are higher in more-developed countries d) they are the same in more-developed and less developed countries The fertility rates are higher in less-developed countries Enzyme activity is driven by what internal factor? a) pH b) temperature c) substrate concentration d) amino acid structure Amino acid structure A new organism has been recently discovered in the ocean. All that is known of the organism's cell structure is that it lacks a membrane bound nucleus. Which of the following indicates how this organism will be classified in terms of cell type?
Which of the following organelles gives rough endoplasmic reticulum its signature rough characteristic? a) ribosomes b) mitochondria c) centrosomes d) vacuoles Ribosomes DNA is to genes, as amino acids are to ______? a) cells b) ribosomes c) rna d) protein Protein Atoms having ___ bonds complete one another by the donation and acceptance of electrons to form stable outer electron shells a) ionic b) covalent c) metallic d) van der waals Ionic
Mutations in what cells can be passed on to future generations? a) brain cells b) germ cells c) skin cells d) nerve cells Germ cells DNA codons encode which of the following? a) blood b) neurons c) amino acids d) cell walls Cell walls During cell replication, which material is duplicated by polymerase enzymes? a) water b) protein c) RNA d) DNA DNA
b) skin cells c) blood cells d) brain cells Germ cells The liquid state of a substance is considered to have a ___ shape and a ___ volume. a) fixed, fixed b) fixed, changing c) changing, fixed d) changing, changing Changing; fixed A researcher conducts a study to examine the effects that time spent in extracurricular involvement has on college entrance exam scores. In this study, extra- curricular involvement is what type of variable? a) dependent b) independent c) extraneous d) qualitative Independent
When an automobile traveling at 60 miles per hour is brought to a rapid stop, the two types of energy most involved are what? a) potential and heat b) potential and kinetic c) kinetic and chemical d) kinetic and heat Kinetic and heat When examining electronegativity values, which atoms will form the least polar bond with hydrogen? a) hydrogen b) fluorine c) chlorine d) bromine Hydrogen Which of the following elements is the best electrical conductor? a) Bromine, b) arsenic c) carbon d) potassium Potassium
c) chromosome d) golgi apparatus Lysosome Which of the following system includes organs between the mouth and anus? a) respiratory b) digestive c) endocrine d) skeletal Digestive Which of the following describes how a Punnett square help predict the genotype of the offspring if the alleles of both parents are known? a) provides information on dominant traits in the parents b) shows what genotypes are possible in the offspring c) provides probabilities of getting an incomplete dominance d) shows exactly what genotypes will occur in offspring Shows what genotypes are possible in the offspring A substance with a pH of 7.0 when dissolved in water is? a) strong acid
b) weak base c) weak acid d) neutral substance A neutral substance Which of the following by-products of cellular respiration is used by autotrophs in the production of glucose? a) ATP b) Carbon dioxide c) chlorophyll d) Oxygen Carbon dioxide A certain disease is carried on the allele (a) which is recessive to the normal condition (A). If a normal (AA) male meet with a female who has the disease (aa), what is the percentage of offspring that are carriers of the disease? a) 0% b) 25% c) 75% d) 100% 100%
After passing through the stomach, food enters into what structure? a) duodenum b) jejunum c) ileum d) cecum Duodenum Which of the following is the term given to multiple forms of a gene that are produced by mutation? a) adaptation b) DNA c) allele d) natural selection Allele During mitosis and cell division, spindle fibers are associated with what organelle? a) centrosomes b) lysosomes c) mitochondria
d) vacuoles Centrosome In which of the following parts of the gastrointestinal tract does that absorption of water primarily occur? a) stomach b) small intestine c) cecum d) colon Colon During which of the following stages of development do individual tissue layers begin to form? a) embryo formation b) zygote development c) gastrulation d) differentiation Gastrulation Which of the following represents the number of different cells formed upon completion of mitosis II? a) 1
