Which of the following is true of chorionic villus sampling?
A. it is a method for discovering genetic defects in a mother through the sampling of amniotic fluid
B. it consists of a sample composed of placental tissue, which is derived from the embryo
C. it involves analyzing a cell that has been removed from an early embryonic state in the laboratory
D. it is usually performed between 24 and 28 weeks of gestation
B. it consists of a sample composed of placental tissue, which is derived from the embryo
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Descent from a common ancestor through males only is called
a. patrilineal descent. b. matrilineal descent. c. bilateral descent. d. endogamy.
Parapithecids were tarsierlike
Indicate whether the statement is true or false
Tarsiers are found in:
A. Southeast Asia B. Central Africa C. Central America D. Southern India
A centralized, multilevel political unit characterized by a bureaucracy that acts on behalf of the ruling elite is called a:
a. state. b. composite band. c. tribe. d. chiefdom.