Which of the following protects from ultraviolet radiation?
a. Carotene?
b. ?Vitamin D
c. ?Melanin
d. ?Melanocytes
e. ?Hemoglobin
c
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Weed Masters provides an annual lawn care service to its customers. Weed Masters has 225 customers and charges $800 per annual lawn service. The company offers a 5 percent discount if customers pay in full at the start of the season. If every customer pays in full at the start of the season, Weed Masters' total revenue is ________.
A) $9,000 B) $180,000 C) $12,000 D) $171,000
Trace the emergence and eventual disappearance of the Neanderthals.
What will be an ideal response?
Symbols are one of the most critical components of culture. Which of the following statements is not true of symbols?
a. Symbols unify people into a group. b. Symbols provide meaning. c. Symbols are completely separate from language. d. Symbols help people identify objects and ideas. e. Symbols are powerful.
Which of the following statements about theories is the most accurate?
A. Theories provide explanations for associations. B. Theories are generalizations that are universally valid. C. Theories refer to a covariation of variables. D. Theories state a uniform association between two variables. E. Theories are untested explanations for something.