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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 Correct Answer: B: Organisms that hav... e chloroplasts in their cells carry on photosynthesis and are therefore autotrophs. Autotrophs make their own food. 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 Correct Answer: D: Water molecules are polar. Due to the fact that O2 draws the electrons in the molecule toward itself. The spaces between neurons are called? a. synapses b. dendrites c. inter-neurons d. cell gaps Correct Answer: A: An impulse travels down the axon of a neuron and reaches the terminus. There, chemicals are released in response, which travel across the synapse to the next neuron. Thus the impulse is transmitted to the next neuron. Which Group of chemicals is not normally found in most living things? a. carbohydrates b. proteins c. silicates d. nucleic acids Correct Answer: C: Carbohydrates, proteins, and nucleic acids (RNA and DNA) are all very important chemicals in living things. The alimentary canal is associated with the? a. spinal cord b. digestive system c. urinary tract d. birth canal Correct Answer: B: The alimentary canal begins at the mouth and ends at the anus. 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 Correct Answer: D: The villi are tiny projections in the small intestine that increase the total surface area of the intestine for absorption of digested nutrients. As light passes obliquely from air to water, it is bent. This bending is called? a. diffraction b. reflection c. refraction d. dispersion Correct Answer: C: Refraction is the bending of light as it passes obliquely from one medium to another. Which of the following organelles is not involved in protein synthesis? a. ribsome b. mitochondrion c. rough endoplasmic reticulum d. nucleus Correct Answer: D: The nucleus contains DNA. The ribosomes, located on the rough endoplasmic reticulum, are the site for protein synthesis. To be absorbed by cells, proteins must be changed to? a. amino acids b. sucrose c. fatty acids d. glycerol Correct Answer: A: Amino acids are the end products of protein digestion and are small enough to be absorbed. 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 Correct Answer: D: A sensory neuron conveys a message from a sensory organ to the spinal cord, which transmits the message via a motor neuron to the effector muscle. Which group of organisms help prevent the accumulation of organic wastes in nature? a. rabbits b. mosses c. bacteria d. ferns Correct Answer: C: Bacteria comprise the decomposer portion of the food chain. 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 Correct Answer: C: High-pitch sounds are heard when the receptor cells closer to the oval window are stimulated, and low-pitch sounds result from the stimulation of the cells that are farther down the cochlea. 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 Correct Answer: A: Remember that during a phase change from liquid to gas the temperature remains constant at 100C. 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 Correct Answer: A: A female has two X chromosomes, and a male has one X chromosome and one Y chromosome. For a human egg to develop into a female, it must be fertilized by a sperm containing an X 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 Correct Answer: B: Sunlight is absorbed by the chlorophyll contained in plants. The absorbed energy fuels photosynthesis which produces glucose. In this food chain, grass is the producer. 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 Correct Answer: D: Equation d is a reaction between an acid (carbonic acid) and a base [(Ca(OH)2] to form water and a salt. It is the only neutralization reaction among the choices. 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 Correct Answer: C: the formula for converting temperature in Celsius to temperature in Fahrenheit is: T Fahrenheit = 9/5 x T Celsius + 32, therefore 5 degrees Celsius convert to 41 degrees Fahrenheit. 9/5 x 5 = 9 9 + 31 = 41F Which of these formulas represents an alcohol? a. C2H5OC2H5 b. C3H8 c. CH3COOH d. C2H5OH Correct Answer: D: An alcohol is usually characterized structurally by the presence of an OH group attached to a hydrocarbon. 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 Correct Answer: C: If a car's rate of change of velocity is negative, the car's acceleration is negative. this means that the car is decelerating (slowing down). [Show More]

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