Hemicholnium-3 blocks the choline transporter, preventing recycling of choline. This drug is a(n)

Compared to today where most Americans live until age 75, in 1900 the average life span was less than ___ years.

A) 55 B) 60 C) 50 D) 45

By what measure does the text conclude that TV has had a bigger impact than the

automobile, the airplane or the computer? (a) the time people spend watching TV as compared with flying, traveling or using a computer (b) their relative economic impact in terms of how much each increases our personal wealth (c) their relative influence on our knowledge of the world (d) the money people spend on each