The theory that evolutionary change (speciation) occurs rapidly over short periods of time and then consists of a long period of stasis or little evolutionary change when species maintain their adaptation to the environment is called __________
A. phyletic gradualism
B. Darwinian evolution
C. punctuated equilibrium
D. convergent evolution
Answer: C
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Groups who cooperate and have mutual obligations based on their descent from a shared ancestor who lived three or four generations ago are called
a. extended families. b. lineages. c. clans. d. chiefdoms.
The rapid expansion and diversification of groups of organisms into newly available ecological niches is termed
a. generalization. b. homology. c. parallel evolution. d. an adaptive radiation. e. specialization.
Small-scale producers of crops or livestock living on rented lands in exchange for labor and exploited by a more dominant class are called:
a. slaves b. serfs c. peons d. peasants
Which of these are characteristic of the chiefdom of Tahiti?
a. An economy based on pastoralism b. A set of inherited ranks of chiefs c. Chiefs with limited secular power only d. Either shared or communally owned property