Question: Lifelong protection after chickenpox is due to which type of immunity?
Answer Choices: A. Nonspecific B. Transplantation C. Active D. Innate
Answer: C. Active
Question: To set a car‑insurance premium, age, model and mileage are considered. Which is the dependent variable?
Answer Choices: A‑ Model B‑ Age C‑ Mileage D‑ Insurance premium
Answer: D Insurance premium
Question: A farmer buys 2 000 lb of fertilizer; 49.5 lb treats 1 acre. Approximately how many acres can he cover?
Answer Choices: A‑ 125 B‑ 1 000 C‑ 40 D‑ 300
Answer: C 40
Question: Which compound is excreted in sweat as protein breakdown waste?
Answer Choices: Lysozymes Urea Water Sebum
Answer: Urea
Question: A mileage‑versus‑gas function contains the point (6, 144). What does it mean?
Answer Choices: Driver can go 144 mi with 6 gal Driver can go 24 mi in 1 h Driver can go 144 mi in 6 h Driver can go 6 mi with 144 gal
Answer: The driver can go 144 miles with 6 gallons of gas.
Question: Excess protons in blood drive which reaction in the carbonic‑acid/bicarbonate buffer?
Answer Choices: H₂CO₃ → CO₂ + H₂O HCO₃⁻ + H⁺ → H₂CO₃ H₂CO₃ → HCO₃⁻ + H⁺ CO₂ + H₂O → H₂CO₃
Answer: HCO₃⁻ + H⁺ → H₂CO₃
Question: A plant‑light experiment with only three plants per group is criticized because…
Answer Choices: A‑ Too few replications for conclusions B‑ Light wavelength is the only variable C‑ Light doesn’t affect photosynthesis D‑ IR has most energy
Answer: A Too few replications
Question: On the pH scale…
Answer Choices: A‑ pH 3 is 10× more alkaline than pH 4 B‑ pH 3 is 10× more acidic than pH 4 C‑ pH 3 is 2× more alkaline than pH 4 D‑ pH 3 is 2× more acidic than pH 4
Answer: B pH 3 is 10× more acidic
Question: In the blood buffer CO₂ + H₂O ↔ H₂CO₃ ↔ HCO₃⁻ + H⁺, excess protons drive which reaction?
Answer Choices: A‑ H₂CO₃ → CO₂ + H₂O B‑ HCO₃⁻ + H⁺ → H₂CO₃ C‑ H₂CO₃ → HCO₃⁻ + H⁺ D‑ CO₂ + H₂O → H₂CO₃
Answer: B HCO₃⁻ + H⁺ → H₂CO₃
Question: Which is a property of water?
Answer Choices: A‑ H₂O = 1 H + 2 O molecules B‑ Ice is denser than liquid water C‑ Water dissolves polar & ionic compounds D‑ Water heats faster than ethanol
Answer: C Water dissolves polar & ionic compounds
Question: A student grows plants under UV, IR, and white light. At the end, only white‑light plants thrive. Which statement is most likely correct?
Answer Choices: A. Three plants do not provide sufficient replications to draw a conclusion. B. Wavelength of light is the only variable changed. C. The wavelength of light does not affect photosynthesis. D. Infrared light contains more energy than the other wavelengths.
Answer: A. Three plants do not provide sufficient replications to draw a conclusion.
Question: From what vessels do the umbilical arteries arise?
Answer Choices: Inferior and superior vena cavae Internal iliac arteries Femoral arteries Superior and inferior mesenteric arteries
Answer: B: Internal iliac arteries