Reviews posted on web sites are:
a. often individual viewpoints
b. not always from reliable and experienced sources
c. always checked by an editor
d. all of the above
e. a and b
Answer: E
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Many foragers live in mobile bands that may split up during part of the year.
Answer the following statement true (T) or false (F)
Ultraviolet radiation can be an important factor in selection for increased melanin production because UV radiation can cause which of the following?
a. ?Albinism b. Spina bifida c. ?The rebuilding of folate d. ?Rickets e. ?Skin cancer
Ani was an important city on the Silk Road, a trade network that extended from Asia to Europe
a. True b. False Indicate whether the statement is true or false
Sambia ethics demanded that family members __________
a. avenge a killing of one of their own b. forgive their enemies c. hand over all weapons d. move away from the enemy tribe