TEAS 7 Science Practice Test Questions Latest 2024/2025

TEAS 7 Science Practice Test Questions Which blood group is a universal donor? a. A b. B c. AB d. O ANSWER d. O Blood oxygen levels are most likely low when blood a. leaves the aorta b. fills the right atrium c. reaches body tissues d. flows through ateries ANSWER b. fills the right atrium with An intracellular chemical signal can be produced in the cell membrane. Once it is produced, where does it go? a. To a different cell b. To another part of the cell c. To a region right outside the cell d. To an area with high ion concentration ANSWER b. To another part of the cell After food has been masticated in the oral cavity, where does it go next? a. Colon b. Liver c. Pancreas

d. Pharynx ANSWER d. Pharynx The diffusion of nutrients through the walls of the digestive system is critical to homeostasis in the body. Where does the majority of this diffusion take place in the digestive system? a. Stomach b. Esophagus c. Oral cavity d. Small intestine ANSWER d. Small intestine As soon as an invader, known as a(n) ______________, enters the body, the body begins to fight. a. antibody b. pathogen c. trigger d. vaccination ANSWER b. pathogen Where is skeletal muscle found? a. Inside the heart b. Attached to bone c. Lining the walls of the bladder d. Within the gastrointestinal tract ANSWER b. Attached to bone If a person smells something sweet, what form of information is this initially perceived as in the nervous system?

a. Cognitive b. Integrative c. Motor d. Sensory ANSWER d. Sensory While hiking, a person is startled after encountering a bear. Her palms get sweaty and her heart starts racing. Which part of her nervous system was directly stimulated? a. Central b. Parasympathetic c. Somatic d. Sympathetic ANSWER d. Sympathetic Parasympathetic = Peace Sympathetic = Stress Which of the following types of tissues include cells of the immune system and of the blood? a. Connective b. Epithelial c. Muscle d. Neural ANSWER a. Connective Epi = first layer Connect = inside Muscle = muscles Neural = brain Which best describes homeostasis?

a. A functional system of the body b. Blood flow to every cell in the body c. A relatively constant environment within the body d. Neural pathways that have integrated into the body ANSWER c. A relatively constant environment within the body Fertilization (the fusing of one sperm and an ovum) results in a(n) _________. a. embryo b. fetus c. infant d. zygote ANSWER d. zygote Which of the following are included in the male reproductive system? a. the penis and epididymis b. the vas deferens and uterus c. the penis and fallopian tubes d. the penis, scrotum, and cervix ANSWER a. the penis and epididymis What structure plays a role in air conduction? a. Alveolus b. Capillary c. Lung d. Trachea ANSWER d. Trachea

What body system is the skeletal system most closed associated with when hematopoiesis happens? a. Urinary system b. Digestive system c. Muscular system d. Cardiovascular system ANSWER d. cardiovascular system What is the final structure through which urine must travel to empty out of the body? a. Bladder b. Kidney c. Ureter d. Urethra ANSWER d. Urethra Which sequence describes the hierarchy level of biological organization? a. Kingdom, phylum, class, order, family, genus, and species b. Genus, class, kingdom, species, order, phylum, and family c. Family, species, genus, order, kingdom, class, and phylum d. Species, kingdom, genus, class, family, phylum, and order ANSWER a. Kingdom, phylum, class, order, family, genus, and species Which example is part of the scientific method? a. A student reads about a new way to harness energy from the sun. b. A researcher studies the effects of car exhaust on how people breathe. c. A researcher analyzes how many plants respond well to a new fertilizer. d. A student discovers how insulin plays a role in the development of diabetes.

ANSWER

c. A researcher analyzes how many plants respond well to a new fertilizer What standard is used to make comparisons in experiments? a. Sample size b. Control group c. Dependent variable d. Independent variable ANSWER b. Control group Why did it take many years for the cell theory to be developed? a. Advancements in microscopy took place slowly. b. Cells were difficult to isolate for experimental analysis. c. Researchers believed a cell formed from preexisting cells. d. Scientists already proved that cells were essential for life.

ANSWER a. Advancements in microscopy took place slowly What organelle is only associated with plant cells? a. Cell wall b. Ribosome c. Cytoplasm d. Golgi apparatus ANSWER a. Cell wall Which of the following is supported by the cell theory? a. Cells are alive and recognized as the building blocks for life. b. Scientists can identify and differentiate cells by using a microscope. c. Cells are produced from existing cells using meiosis instead of mitosis d. Living things are composed of a single cell that remains undifferentiated.

ANSWER a. Cells are alive and recognized as the building blocks for life.

What raw inorganic material would an autotroph most likely to create chemical energy for growth? a. Carbon dioxide b. Minerals in soil c. Decaying matter d. Sugar molecules ANSWER b. Minerals in soil When would a cell most likely contain the most nucleotides? a. S b. G1 c. M d. G2 ANSWER b. G1 phase What is the correct order of the stages of the cell cycle? a. G1, S, G2, M b. G2, S, G1, M c. M, S, G2, G1 d. S, M, G1, G1 ANSWER a. G1, S, G2, M A student notices a pattern of stripes on five tigers. Each of the five tigers has the same stripe pattern. Using his inductive reasoning, what does he logically assume based on this information? a. The pattern continues to change over time. b. Natural adaptations cause this pattern to occur.

c. Each offspring will have the same stripe pattern. d. Ancestors of the tigers have different stripe patterns.

ANSWER c. Each offspring will have the same stripe pattern.

A researcher notices a positive correlation between the height of a plant and nutrient concentration over time. Based on this observation, what conclusion does he reach? a. The height of a plant increases in the absence and presence of the nutrients. b. When the amount of nutrients available to the plant decreases, its height increases. c. The amount of nutrients available to a plant is independent of how tall the plant gets. d. When the amount of nutrients available to the plant increases, its height also increases.

ANSWER d. When the amount of nutrients available to the plant increases, its height also increases.

Which statement best represents Mendel's experiments with garden peas? a. As a result, Mendel developed several theories that have since been disproved. b. Mendel realized he was on an incorrect track, which led him to other experimental media. c. As a result, Mendel developed foundational conclusions that are still valued and followed today. d. Mendel collaborated with others interested in genetics to develop heredity guidelines we still use today.

ANSWER d. Mendel collaborated with others interested in genetics to develop heredity guidelines we still use today.

Which of the following is a component of a chromosome? a. Centromere b. Gamete c. Homologue d. Ribose ANSWER a. Centromere

What solution has a pH of 7? a. Aniline b. Pyridine c. Pure water d. Sodium hydroxide ANSWER c. Pure water Which is classified as a type of acid-base reaction that produces salt? a. Combination b. Decomposition c. Hydrolysis d. Neutralization ANSWER d. Neutralization Which of the following determines the strength of an acidic solution? a. Litmus paper that turns red. b. Litmus paper that turns blue. c. Measured pH value equal to 7. d. Measured pH value less than to 7.

ANSWER d. Measured pH value less than to 7.

What type of bond forms between nitrogen and oxygen, and why? a. Ionic, because electrons are shared. b. Covalent, because electrons are shared. c. Ionic, because electrons are transferred. d. Covalent, because electrons are transferred.

ANSWER

b. Covalent, because electrons are shared.

Which of the following atoms is a cation? a. 14 protons, 14 neutrons, 18 electrons b. 34 protons, 45 neutrons, 36 electrons c. 35 protons, 44 neutrons, 35 electrons d. 82 protons, 125 neutrons, 78 electrons ANSWER d. 82 protons, 125 neutrons, 78 electrons A spoonful of sugar is added a hot cup of tea. All the sugar dissolves. How can the resulting solution be described? a. Saturated and homogeneous b. Saturated and heterogeneous c. Unsaturated and homogeneous d. Unsaturated and heterogeneous ANSWER c. Unsaturated and homogeneous In the following single-replacement reaction, _________ replaces ___________.

Cl2 + 2NaI -> 2NaCl + I2 a. sodium, iodine b. chlorine, iodine c. chlorine, sodium d. sodium, chlorine ANSWER b. chlorine, iodine What type of reaction is described by the following equation?

ZnBr2(aq) + 2KOH(aq) -> Zn(OH)2(s) + 2KBr(aq) a. Synthesis b. Decomposition

c. Single-Replacement d. Double-Replacement ANSWER d. Double-Replacement ___________ is dependent not only on the temperature, but also on the amount of substance available. a. Condensation b. Deposition c. Evaporation d. Melting ANSWER c. Evaporation During which of the following phase changes will the cohesion between particles in a substance decrease? a. Condensation b. Deposition c. Freezing d. Vaporization ANSWER d. Vaporization In which state of matter are the intermolecular forces between particles in a substance the strongest? a. Gas b. Liquid c. Plasma d. Solid ANSWER d. Solid

Mendel discovered the pattern associated with ____________ after developing a series of rules in genetics. a. epigenetics b. heredity c. heterogeneity d. taxonomy ANSWER b. heredity The sequence of amino acids in a gene determines a. the primary structure of a codon. b. the primary structure of a protein. c. the primary structure of a nucleotide. d. the primary structure of a nucleic acid.

ANSWER b. the primary structure of a protein.

Which is true regarding the Urinary system? (Select all that apply.) a. Kidneys make urine. b. As a person ages, kidney tissue and filtration capacity increase. c. Kidneys help regulate water balance. d. Regulates levels of electrolytes such as sodium and potassium. e. Eliminates metabolic wastes.

ANSWER c. Kidneys help regulate water balance. d. Regulates levels of electrolytes such as sodium and potassium. e. Eliminates metabolic wastes.

During the aging process, not all hormone levels decrease; some actually increase. Which of the following is a hormone that may increase as a person ages? a. Cortisol b. Insulin c. Luteinizing

d. Thyroid ANSWER c. Luteinizing Hormones that decrease: - Estrogen (in women) - Testosterone (in men) - Growth hormone - Melatonin Hormones that usually remain unchanged or slightly decrease: - Cortisol - Insulin - Thyroid hormones Hormones that increase: - Follicle-stimulating hormone (FSH) - Luteinizing hormone (LH) - Norepinephrine - Epinephrine, in the very old - Parathyroid hormone What phase is the cell cycle part of? a. Interphase b. Metaphase c. Prophase d. Telophase ANSWER a. Interphase In which state of matter do the particles of iron have the lowest amount of cohesion? a. Solid iron particles have the lowest of cohesion. b. Liquid iron particles have the lowest amount of cohesion. c. Gaseous iron particles have the lowest amount of cohesion. d. The particles have the same amount of cohesion in all states of matter.

ANSWER

c. Gaseous iron particles have the lowest amount of cohesion.

A person is diagnosed as having acidosis, a condition in which the blood pH is below 7.45. What does the doctor most likely conclude? a. Too much carbon dioxide is found in the blood. b. Highly oxygenated blood circulates through the body. c. A blockage prevents blood from leaving the pulmonary artery. d. The nasal cavity has a difficult time clearing particles from the air.

ANSWER a. Too much carbon dioxide is found in the blood.

An atom has 28 protons, 32 neutrons, and 28 electrons. What is the name of this isotope? a. Nickel - 32 b. Nickel - 60 c. Germanium - 56 d. Germanium - 60 ANSWER b. Nickel - 60 The physical appearance or ___________ of an organism is determined by a set of alleles. a. genotype b. phenotype c. transciption d. translation ANSWER b. phenotype Arrange the path of food through the digestive system. a. Oral cavity b. Esophagus c. Large intestine d. Pyloric sphincter

e. Colon f. Small intestine g. Pharynx ANSWER a. Oral cavity b. Pharynx c. Esophagus d. Pyloric sphincter e. Small intestine f. Large intestine g. Colon