TEAS Test Science Questions

An organism with chloroplasts in its cells is probably. a. a heterotroph b. an autotroph c. an herbivore d. a primary consumer

What property of water allows someone to fill a glass slightly above the rim without the water flowing over? a. specific gravity b. capillarity c. opacity d. surface tension

The spaces between neurons are called? a. synapses b. dendrites c. inter-neurons d. cell gaps

Which Group of chemicals is not normally found in most living things? a. carbohydrates b. proteins c. silicates d. nucleic acids

The alimentary canal is associated with the? a. spinal cord b. digestive system c. urinary tract d. birth canal

The numerous villi in the small intestine serve to? a. secrete enzymes for digestion b. absorb water from dissolved foods c. secrete hydrochloric acid to dissolve food d. provide greater surface for absorption

As light passes obliquely from air to water, it is bent. This bending is called? a. diffraction b. reflection c. refraction d. dispersion

Which of the following organelles is not involved in protein synthesis? a. ribsome b. mitochondrion c. rough endoplasmic reticulum d. nucleus

To be absorbed by cells, proteins must be changed to? a. amino acids b. sucrose c. fatty acids d. glycerol

A neuron that transmits impulses from the receptors to the spinal cord is called? a. motor neuron b. an associative neuron c. an interneuron d. a sensory neuron

Which group of organisms help prevent the accumulation of organic wastes in nature? a. rabbits b. mosses c. bacteria d. ferns

As the eardrum is made to vibrate more rapidly, the sound is perceived as? a. louder in intensity b. softer in intensity c. higher in pitch d. lower in pitch

In a field of pure white asters, a grower noticed a single blue aster. How could the grower test whether this change affected the gamete-producing cells of the plant? a. self-pollinate the flower, and plant the resulting seeds b. examine the blue petals under an electron microscope c. preform a chemical analysis to find the nature of the blue pigment d. preform vegetative propagation on a cutting of the plant

A human egg will develop into a female if it is fertilized by sperm containing? a. an X chromosome b. a Y chromosome c. an XY chromosome d. an XXY chromosome

In a food chain involving grass, grasshoppers, birds and mammals, the orginal source of energy is? a. glucose b. sunlight c. chlorophyll d. ATP

Which of the following equations represents a neutralization reaction? a. 2Na+MgCl2 > Mg+2NaCl b. CaCO3+4C > 3CO+CaC2 c. 4NH3+5O2 > 6H2O+4NO d. H2CO3+Ca(OH)2 > 2H2O+CaCO3

A reading on the Celsius scale is 5. On the Fahrenheit scale, the reading would be closet to? a. 225 b. 30 c. 40 d. 95

Which of these formulas represents an alcohol? a. C2H5OC2H5 b. C3H8 c. CH3COOH d. C2H5OH

If a car's rate of change of velocity is negative, the car is? a. speeding up b. maintaining a constant speed c. slowing down d. stopped

Consider the unbalanced equation __N2+__H2 > __NH3. What is the coefficient of ammonia in the balanced equation that has the smallest whole-number coefficient? a. 1 b. 2 c. 3 d. 4

Which of these nitrogenous bases may be found in RNA, but not DNA? a. uracil b. adenine c. thymine d. guanine

A substance with a ph of 8 is a? a. strong acid b. weak acid c. strong base d. weak base

Binary fission in paramecia and budding in yeast cells are examples of? a. asexual reproduction only b. sexual reproduction only c. spontaneous generation and sexual reproduction d. both sexual and asexual reproduction

Which of these substances forms an alkaline solution in water? a. Mg(OH)2 b. H2SO4 c. MgSO4 d. NaCl

Certain seaweeds accumulate iodine in a concentration as much as a million times greater than that of the surrounding ocean. How must this intake be accomplished? a. osmosis b. diffusion c. active transport d. passive transport

Hydrogen can be prepared in the laboratory by combining Zn and HCl. In the resulting reaction, the metallic zinc (Zn). a. is changed to another element b. reacts with the water in the acid c. replaces the combined hydrogen in the acid d. serves as a catalyst

Which of the following organisms has a nutritive process most similar to that of animals? a. seaweed b. oak tree c. grass d. bread mold

The solubility of a solid in a liquid generally increases with? a. an increase in temperature b. an increase in pressure c. a decrease in temperature d. a decrease in pressure

Which of these substances has the highest boiling point? a. ether b. ethanol c. water. d. glycerol

In humans, if the diaphragm is pushed upward there is a decrease in chest volume. this decrease is followed by? a. an increase in pressure in the chest cavity and inhalation b. an increase n pressure in the chest cavity and exhalation c. a decrees in pressure in the chest cavity and inhalation d. a decrease in pressure in the chest cavity and exhalation

Which of these biological processes includes the other three? a. cell respiration b Krebs cycle c. electron transport chain d. anaerobic splitting of glucose

A 5-year-old and her father each lifted identical chairs from the floor to the table top. Which person did the most work? a. the father b. the 5-year-old c. they both did the same amount d. not enough information is given

An excess of which of these ions tends to make a solution acidic? a. chloride b. hydroxyl c. hydronium d. sodium

In the classification of two organisms, which of the following is the best evidence of a close relationship? a. similar number and arrangement of bones b. similar sequence of amino acids in their proteins c. similar methods of sexual reproduction d. similar methods of cell respiration

In Einstein's equation, E=mc2, which does C represent? a. the quantum numbers of the atoms involved b. the number of coulombs c. the number of calories of heat d. the speed of light

the vaporization of solid dry ice to gaseous carbon dioxide by heating is an example of? a. sublimation b. evaporation c. precipitation d. condensation

On top of a mountain, the boiling point of water is? a. lower then at sea level, because the atmospheric pressure is higher on the mountain b. lower then at sea level, because the atmospheric pressure is lower on the mountain c. the same as at sea level, because the atmospheric pressure is the same in both locations d. higher then at sea level, because the atmospheric pressure is lower on the mountains

Suppose cube A is 10cm along each edge and cube B is 5 cm along each edge. What is the relationship of the volume of cube A to that of Cube B? a. cube A has two times the volume of cube B b. cube A has four times the volume of cube B c. cube A has six times the volume of cube B d. cube A has eight time the volume of cube B

Which of these substances is a product of cellular respiration in animals? a. ATP b. RNA c. ethanol d. oxygen

The tiny projections in the small intestine adapted for absorption are called? a. venules b. villi c. alveoli d. nephrons

More energy is used in pushing a box up along an inclined plane to a height of 4 m then in liftting the box straight up to the same height. This is because? a. more force is needed in pushing the box then in lifting it b. work is done against friction in pushing the box along the plane c. the box moves a greater distance when pushed along the plane then when lifted d. it takes more time to push the box along the plane then to lift it

A student wants to grow a bacterial culture. Which of these environments is best suited for growing most most kinds of bacteria? a. a lighted window at 72 F b. a refrigerator at 45 F c. an incubator at 37 C d. a freezer at 10 C

A closed container of hydrogen gas is warmed from 20 C to 25 C. If the volume remains the same, what will happen to the pressure in the container? a. it will remain the same b. it will decrease c. it will fluctuate d. it will increase

Most of the work done by the human kidney occurs in the? a. nephron b. neuron c. ureter d. alveolus

An equal-arm balance is balanced when 20 washers are on one side and 10 bolts are on the other. Four bolts are added to one side. How many washers must be added to the other side o maintain balance? a. 14 b. 8 c. 4 d. 2

Compounds with different molecular structures but but the same formula are called? a. isomers b. isobars c. isotopes d. isotherms

A student wanted to test the effects of different sugars on the growth of a certain mold. The sugars to be tested were glucose, fructose, and sucrose. One gram of each sugar was placed in a tube of 10 mL of water, and a bit of the mold was put in each of the three solutions. To add a control to the experiment, the student should also have? a. made two

Vinegar is a common antidote for the ingestion of lye. What is the chemical process underlying this treatment? a. digestion b. alkalinization c. oxidation d. neutralization

Undisturbed layers of rock were examined. Mammal, fish, and bird fossils were found only in the upper layers. Fish were in layers beneath those, and neither fish, birds, nor mammals were in the deepest layers. This would tend to support the hypothesis that? a. vertebrates always coexisted with invertebrates b. fish were the first vertebrates to evolve c. all vertebrates evolved at about the same time d. birds evolved before fish

Blue litmus paper will turn red when placed in a solution having which of the following ph values? a. 14 b. 12 c. 7 d. 3

Given the unbalanced equation __KClO3 > ___KCl + ___O2 What is the coefficient of O2 in the balanced equation? a. 1 b. 2 c. 3 d. 4

The compound H2SO4 is an example of? a. a salt b. a base c. an acid d. a halogen

Many people believe that some trees drop their leaves in the late fall because the temperature is near freezing. Which of the following statements least supports this idea? a. Maple trees in northern Minnesota drop their leaves in late fall. b. Maple trees growing near city lights stay green longer than those far from the lights. c. Maple trees pass through a time of near freezing before they bud d. Maple trees in southern Florida drop their leaves in late fall

Which of the following is considered a principal ecological role of green plants in the environment? a. providing shade to regulate the environmental temperature b. using the mineral content of the soil c. providing nesting places for animals d. manufacturing food from simple materials

In a flask containing 500 mL of NaCl(aq), the solvent is? a. Na+ b. H2O c. Cl- d. NaCl(s)

The diameter of the low-power field of a certain microscope is 1.6 mm. The diameter of a cell that is half the diameter of the field is? a. 500 um b. 800 um c. 1000 um d. 1600 um

Twenty-five milliliters of a saline solution contains 5g of NaCl. What percentage solution is it? a. 5% b. 12.5% c. 20% d. 25%

In pea plants, plant height and seed color obey the law of independent assortment. If seeds are hybrid for both of these traits, how will their offspring most likely appear? a. all tall, with green seeds b. all short, some with yellow and some with green seeds c. some tall and some short, with all green seeds d. some tall and some short, with green or yellow seeds

During the 1930s and through the 1950s, thousands of American children received x-ray treatment for swollen tonsils and adenoids. X-rays are no longer used to treat this condition because large doses of radiation? a. were found to stimulate excessive hair growth b. are thought to cause certain types of cancer c. are thought to increase the severity of acne during adolescence d. were found to increase the number of cases of tonsillitis.

A student studies a structure microscopically and notes that it contains glandular cells. It has blood vessels entering and leaving it, but it has no duct leading out of it. The structure must be? a. an endocrine gland b. an excretory gland c. a digestive gland d. a tear gland

Which laboratory reagent turns starch blue-black? a. phenolphthalein b. Benedict's solution c. nitric acid d. Lugol's solution

What types of body cells are most directly involved when a person walks up hill? a. smooth muscle cells b. subcutaneous cells c. striated muscle cells d. epithelial cells

When red food coloring is added to a beaker of water, the coloring slowly spreads until the water is all colored pink. This is best explained by the process of? a. peristalsis b. diffusion c. active transport d. osmosis

Many chemical reactions occur more rapidly with platinum as a catalyst. At the end of the reaction, the platinum is found to be? a. increased in quantity b. unchanged in weight c. changed into another state d. combined into the final product

Which formula represents a carbohydrate? a. C6H6 b. C2H5OH c. CHCOOH d. C6H12O6

When looking through a microscope, a student observes centrosomes in a group of cells. The cells are most likely from the? a. root of a bean plant b. leaf of a moss c. skin of a mouse d. stem of a fern

Ohm's law is used tin the study of? a. electricity b. mechanics c. thermodynamics d. optics

A cloud chamber is a device used for? a. studying the formation of weather systems b. recreating the atmosphere of the primitive earth c. treating a respiratory infection d. studying charged particles

Which of these temperatures could not occur? a. -0 C b. -10 K c. 2,000 F d. 104 C

Which organisms are classified as protists? a. protozoa, bacteria, and worms b. fungi, ferns, and mollusks c. monkeys, apes, and man d. protozoa and algae

How much of 12g of a radioactive isotope with a half-life of 20 years will be left after 40 years? a. 0g b. 3g c. 6g d. 8g

Two atoms are isotopes if they have the same atomic number but a different number of? a. neutrons b. mesons c. electrons d. protons

Shivering to maintain a 98.6F Temperature in cold weather is an example of? a. homeostasis b. synthesis c. hydrolysis d. transpiration

If a plain Soda cracker is chewed slowly, after a while it begins to taste more? a. salty b. sweet c. bitter d. bland

The scientific name of a beaver is Castor Canadensis. Similarly, a coyote is Canis latrans, a mountain lion is Felis concolor, a wolf is Canis lupus, and a cougar is Puma concolor. Which two of these animals belong to the same genus? a. beaver and wolf b. cougar and mountain lion c. coyote and wolf d. mountain lion and cougar

The first step by which a mutation my occur is a change in the ? a. location of a nitrogen base in DNA b. messenger RNA c. transfer RNA d. amino acid in a protein synthesis

In the equilibrium system A + B <> C + 30 kcal we can say that the? a. reverse reaction is exothermic b. forward reaction is exothermic c. reverse reaction requires a catalyst d. forward reaction is endothermic

A compound that can act like either an acid or a base is described as? a. amphoteric b. isomeric c. hydrolytic d. polymeric

The diffusion of water through a semipermeable membrane is called? a. pinocytosis b. osmosis c. active transport d. transpiration-tension

Bean plant seeds are germinated in a dark closet. The seedlings lack the color green. Which of the following statements is the best explanation for this? a. Bean plants are heterotrophs b. Bean seedlings lack nitrogen in their seed leaf c. The absence of an environmental factor limits the proper genetic expression d. Bean plants cannot be classified as green plants

An organism that has jointed legs, an exoskeleton, and a specialized segmented body belongs to the phylum of? a. mollusks b. echinoderms c. arthropods d. chordates

Nerve impulses form the retina are transmitted to the brain by the? a. olfactory nerve b. optic nerve c. Eustachian tube d. auditory nerve

In which of these structures does the normal development of a human embryo occur? a. ovary b. uterus c. vagina d. oviduct

In humans, which of these blood components carries most of the oxygen? a. plasma b. white blood cells c. platelets d. red blood cells

Compound A reacts with compound B to give compound C plus compounds D and E, as shown by the following equation: A+B> C+D+E If in a closed system, 7g A react with 4g B to give 2g C plus 3g E, how many grams of D are produced? a. 5 b. 6 c. 11 d. 16

Which of the following statements best describes how pressure and volume are affected as a sample of ideal gas is heated in a rigid, sealed container? a. neither pressure nor volume will increase b. pressure will remain constant, and volume will increase c. both pressure and volume will decrease d. pressure will increase, and volume remains constant

An object is traveling at a constant velocity of 100m/sec. How far will it travel in 20 sec? a. 5m b. 120m c. 200m d. 2,000m

A student placed a stone in a gradulated cylinder containing 30cm3 of water. She then noted that the water level rose to 55cm3 mark. What is the volume of the stone? a. 25cm3 b. 30cm3 c. 55cm3 d. 85cm3

A 36-W lam is operated by a 9-V battery. How many amperes of current are flowing through the lamp? a. 0.25 A b. 4 A c. 27 A d. 45 A

Which of the following terms are included in the scientific name of an organism? a. genus and species b. phylum and species c. family and genus d. kingdom and phylum

Which of the following would be classified as an example of connective tissue? a. striated muscle b. epidermis c. nerve d. tendon

The entry and exit of materials in the animal cell are regulated by which of these cell organelles? a. nucleolus b. cell wall c. endoplasmic reticulum d. plasma membrane

Which of the following structures is the functional unit of the human lung? a. bronchus b. Malpighian tubule c. nephron d. alveolus

Which of these substances is an end product of protein digestion? a. amino acids b. lipid c. fatty acids d. cholesterol

If a person's gallbladder were removed by surgery, which of the following substances would he have the most difficulty digesting? a. carbohydrates b. nucleic acids c. fats d. proteins

Which of the following phenomena is most likely to speed the evolutionary rate of a species? a. lack of environmental changes b. increase in mutations c. decrease in migration d. increase in death rate

The code of a gene is delivered to the protein-producing region of a cell by? a. m-RNA b. t-RNA c. DNA d. ATP

Which of the following particles are nucleons? a. neutrons and electrons b. electrons, protons and neutrons c. neutrons and protons d. electrons, photons, and neutrons

Quantities having both magnitude and direction are called? a. line segments b. scalars c. vectors d. directrixes

Which of the following statements best describes the functioning of a battery? a. it changes chemical energy into electrical energy b. it stores electricity c. it creates electrons d. it changes current into voltage

A 4-N (-newton) and an 18-N force are acting in opposite directions on the same point of an object. The magnitude of their resultant is? a. 0N b. 14N c. 18N d. 22N

Which of the following equations represents aerobic respiration? a. C6H12O6 + 6O2 > 6CO2 + 38ATP b. C6H12O6 + C6H12O6 > C12H22O11 + H2O c. C6H12O6 > 2CO2 + 2C2H5OH + 2ATP d. 6CO2 + 12H2O > C6H12O6 + 6O2 + 6H2O

An overdose of a muscle relaxant may cause a person to cease breathing because? a. the diaphragm will be unable to contract b. the lung muscles will cease to function c. the muscles around the trachea will constrict d. the alveoli will constrict

A decrease in acetylcholine synthesis in humans would most likely lead to? a. an increase in protein digestion b. a decrease in nerve impulse transmission c. an increase in muscular activity d. a decrease on white blood cells

An unknown substance is boiled with Benedict's solution The brick red color that results indicates the presence of? a. protein b. acid c. starch d. glucose

Which are herbivores? a. green plants b. insects c. birds d. snakes

According to this pyramid to support 100 lb of birds, which of the following is needed? a. more then 100 lb of insects b. more than 100 lb of snakes c. less than 100 lb of green plants d. 100 lb of insects

Ozone is an allotrope of? a. hydrogen b. water c. oxygen d. uranium

Which of these values could be the ph of an acid rain sample? a. 12.0 b. 8.0 c. 7.0 d. 4.0

A specific isotope has an atomic number of 51 and a mass number of 122. How many electrons are contained in the neutral atom? a. 51 b. 71 c. 122 d. 173

A mixture such as mayonnaise is best described as? a. a substance b. saturated c. a solution d. an emulsion

Which of the following terms is the SI unit for work? a. joule b. watt c. ampere d. meter

A woman standing at a bus stop hears the siren of an approaching ambulance. As the ambulance passes by her, she observes a shift in the frequency of the siren. The effect she heard is known as the? a. photoelectric effect b. Doppler effect c. phase shift effect d. Einstein effect

The pitch of ta vibrating string depends on all of the following except? a. the length of the string b. the amplitude of the vibration c. the thickness of the string d. the frequency of the vibration

The specific heat of water is 1 cal/g/C. How many calories of heat are needed to raise the temperature of 30g of water from 25 C to 75 C. a. 50 Cal b. 750 Cal c. 1,500 Cal d. 2,250 Cal

As the angle of incidence of a ray of light striking a mirror increases, the angle of reflection will? a. increase b. decrease c. remain the same d. first increase, then remain constant

The idea that new varieties of organisms are evolving today is best supported by the? a. increasing need for new antibiotics b. diminishing size of the ozone layer c. climate changes resulting in global warming d. increasing size of the human population

In a food chain, an organism that feeds on green plants is known as a? a. decomposer b. producer c. first-order consumer d. second-order consumer

Which of the following parts of a compound microscope is used to adjust the amount of light? a. diaphragm b. objective lens c. eyepiece d. coarse adjustment knob

A cell is placed in a drop of distilled water. The cell swells and bursts. The most likely cause of this reaction is that? a. active transport of salts occurs b. water moves from an area of low particle concentration to an area of high particle concentration c. water moves from an area of high particle concentration to an area of low particle concentration d. salts from the distilled water enter the cell

In pea plants, tallness is dominant over shortness. If 25% of one generation of pea plants is short, what were the probable genotypes of the parents? a. tt x tt b. Tt x tt c. TT x Tt d. Tt x Tt

Which of the following terms refers to the capacity of a microscope to distinguish between objects that lie very close to each other? a. resolving power b. staining c. micro-dissection d. magnifying power

Which of the following formulas is most probably for a compound formed from aluminum and sulfur? (Aluminum has an oxidation number of 3+. Sulfur has an oxidation number of 2-.) a. AIS b. Al3S2 c. Al2S d. Al2S3

Which of the following is not used as a means of separating mixtures? a. filtration b. electrolysis c. chromatography d. distillation

The law of chemical equilibrium states that in the reversible reaction N2 + 3H2 > 2NH3 the equilibrium constant is expressed as? (the equations are long so I am only putting the answer down.)

Which of the following elements is a nonmetal? a. Na (sodium) b. Hg (mercury) c. S (sulfur) d. Mn (manganese)

Machines may be used for all of the following purposes except to? a. multiply force b. increase energy d. transform energy d. multiply speed