Question: Which of the following is a property of water?
Answer Choices: Water is made up of one molecule of hydrogen and two molecules of oxygen; Solid water is more dense than liquid water; Water dissolves polar and ionic compounds; Water requires less heat than ethanol to raise its temperature
Answer: Water dissolves polar and ionic compounds
Question: A scientist predicts that germinating beans will use more oxygen than non-germinating beans. This prediction is referred to as which of the following?
Answer Choices: A hypothesis; A conclusion; An observation; Data collection
Answer: A hypothesis
Question: Which of the following best describes adaptive immunity?
Answer Choices: The body’s barrier defenses, such as mucous membranes and secretions; The initiation of internal defenses, such as phagocytes and natural-killer cells; A response to specific traits of specific pathogens; The initiation of the inflammatory response
Answer: A response to specific traits of specific pathogens
Question: A vasectomy is a procedure in which the vas deferens are cut. Why does a vasectomy lead to infertility?
Answer Choices: The vasectomy blocks the movement of sperm from the epididymis into the urethra; The vasectomy blocks the movement of sperm from the ejaculatory duct into the bulbourethral gland; The vasectomy blocks the movement of sperm from the prostate gland to the bulbourethral gland; The vasectomy blocks the movement of sperm from a testis into the epididymis
Answer: The vasectomy blocks the movement of sperm from the epididymis into the urethra
Question: Which of the following describes why water has a concave (downward-curving) meniscus when poured in a glass beaker?
Answer Choices: The adhesive forces with the glass are greater than the cohesive forces; The cohesive forces with the glass are greater than the adhesive forces; Glass has a higher density than water; Water has a higher density than glass
Answer: The adhesive forces with the glass are greater than the cohesive forces
Question: Which of the following is correct regarding the pH scale?
Answer Choices: A substance with a pH of 3 is 10 times more alkaline than a substance with a pH of 4 A substance with a pH of 3 is 10 times more acidic than a substance with a pH of 4 A substance with a pH of 3 is two times more alkaline than a substance with a pH of 4 A substance with a pH of 3 is two times more acidic than a substance with a pH of 4
Answer: B) A substance with a pH of 3 is 10 times more acidic than a substance with a pH of 4
Question: Which of the following occurs during inhalation?
Answer Choices: Air moves from areas of low pressure to areas of high pressure; The ribcage lowers; The volume of the thoracic cavity decreases; The diaphragm moves downward
Answer: The diaphragm moves downward
Question: Which of the following is a function of a catalyst?
Answer Choices: To increase the activation energy of a reaction; To increase the product yield; To convert a non-spontaneous reaction to a spontaneous reaction; To increase the rate of a reaction
Answer: To increase the rate of a reaction
Question: Lifelong protection after exposure to a virus such as chickenpox is due to which type of immunity?
Answer Choices: Nonspecific; Transplantation; Active; Innate
Answer: Active
Question: A student tested ultraviolet, infrared, and white light on Arabidopsis plants. IR plants scorched, UV plants wilted, white-light plants grew normally. Which statement is most likely correct?
Answer Choices: Three plants do not provide sufficient replications to draw a conclusion; Wavelength of light is the only variable changed between groups; The wavelength of light does not affect photosynthesis; Infrared light contains more energy than the other wavelengths
Answer: Three plants do not provide sufficient replications to draw a conclusion
Question: Which of the following substances is excreted by sweat glands in response to the breakdown of proteins and the formation of ammonia?
Answer Choices: Lysozymes; Urea; Water; Sebum
Answer: Urea
Question: The diagram summarizes the carbonic-acid/bicarbonate buffer system of the blood: CO₂ + H₂O ↔ H₂CO₃ ↔ HCO₃⁻ + H⁺. Which equation shows the reaction that takes place when there are excessive protons (H⁺) in the blood?
Answer Choices: H₂CO₃ → CO₂ + H₂O; HCO₃⁻ + H⁺ → H₂CO₃; H₂CO₃ → HCO₃⁻ + H⁺; CO₂ + H₂O → H₂CO₃
Answer: HCO₃⁻ + H⁺ → H₂CO₃
Question: Which of the following is correct regarding the pH scale?
Answer Choices: A substance with a pH of 3 is 10 times more alkaline than a substance with a pH 4; A substance with a pH of 3 is 10 times more acidic than a substance with a pH 4; A substance with a pH of 3 is two times more alkaline than a substance with a pH 4; A substance with a pH of 3 is two times more acidic than a substance with a pH 4
Answer: A substance with a pH of 3 is 10 times more acidic than a substance with a pH 4
Question: Carbon has an atomic number of 6. Which of the following is true about the isotope C-12?
Answer Choices: C-12 possesses 7 neutrons and 5 electrons in its nucleus; C-12 possesses 7 protons and 5 neutrons in its nucleus; C-12 possesses 6 neutrons and 6 protons in its nucleus; C-12 possesses 6 protons and 6 electrons in its nucleus
Answer: C-12 possesses 6 neutrons and 6 protons in its nucleus