The ancient DNA studied is usually mtDNA because mtDNA __________
a. is more durable
b. varies so little from generation to generation
c. is so abundant
d. is much bigger than nuclear DNA
Answer c
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Until recently, the prevailing view was that humans were __________.
A) in North America more than 50,000 years ago B) not present south of Alaska until after 11,500 years ago C) driven south by the expansion of the ice sheets D) originally in North America, and then moved into Asia
Which of the following prehistoric cultigens is NOT correctly matched with its original place of domestication?
A. Ireland—potato B. Southwest Asia—barley C. Andean South America—lima beans D. Mesoamerica—squash
The material assigned to the species Ardipithecus ramidus that has been examined so far suggests that this species is very closely related to:
A. chimpanzees B. New World monkeys C. Old World monkeys D. prosimians
In _________ the young are born in an extremely immature state and complete development in their mother's external pouch
a. placental mammals b. monotremes c. marsupials d. reptiles e. rodents