The energy-requiring process by which liquid water becomes water vapor (a gas) is
A. All of the answer choices are correct.
B. sublimation.
C. condensation.
D. evaporation.
E. convection.
D. evaporation.
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Which pair of hormones regulates the calcium levels of the blood?
a. thyroxin and parathyroid hormone b. adrenocorticotropic hormone and thyroid stimulating hormone c. prolactin and oxytocin d. parathyroid hormone and calcitonin e. calcitonin and thyroxin
Which one of the following STDs is NOT caused by a virus?
A) AIDS B) chlamydia C) genital warts D) genital herpes
See diagram. How many protons does Carbon have?
a. 12.001 b. 6 c. 18.001 d. 12
A mild climate, sudden increases in the rodent population due to a construction boom, and direct contact with the rodents' feces and urine would potentially bring about the spread of ________ in a population that carries the pathogen
a. Bacillus anthracis b. Cryptosporidium parvum c. hantavirus d. SARS coronavirus