For what purpose were Oldowan tools most likely used?

A specialized species:

A. is closely fitted to a specific niche B. cannot tolerate much change in its niche C. exhibits little variation D. all of these

The earliest known agricultural crops were __________ and __________, found in the Middle East by about 12,000 years ago

a. corn; rice b. maize; wheat c. wheat; barley d. manioc; barley

When Tanzania became independent in the 1960s, there were some 120 mutually unintelligible languages spoken there. How did Tanzania address this challenge?

a. They outlawed all tribal languages and chose to speak French instead, b. They adopted Swahili as a neutral official language for everyone. c. They mandated the language of the majority of their citizens to be their national language. d. They declared no official language and instead encouraged people to become multilingual. e. They selected two national languages as a way of accommodating many citizens.

There are ________ different types of mammalian teeth.

Fill in the blank(s) with the appropriate word(s).