The concentration of H+ in milk of magnesia, which has a pH of 10, is _____ times lower than that of seawater, which has a pH of 8
a. 10
b. 100
c. 2
d. 20
Answer: b
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An elephant’s trunk does not have any bones. However, it has many muscles, and the tip has
very precise movements that allow it to pick a single leaf from a tree. What type of skeleton allows this movement to occur?
a. hydrostatic skeleton b. exoskeleton c. antagonistic skeleton d. pressurized skeleton
If your mass is 70 kg on Earth, how much is your mass on the Moon?
a. less than 70 kg. b. more than 70 kg. c. 70 kg. d. none of the above.
Hydrochloric acid in the stomach aids in
a. digestion of fats. b. digestion of proteins. c. digestion of carbohydrates. d. production of leptin. e. destruction of microbes in food and digestion of proteins.
The axons of retinal ganglion cells grow through the lumen of the optic stalks and develop into which nerve?
A. Oculomotor B. Olfactory C. Ophthalmic D. Optic E. Otic