More than ____ species, 60,000 from the Amazon Basin alone, comprise the known native plants of
South America.
a. 120,000 c. 112,000
b. 132,000 d. 150,000
Question 2The northernmost boundary of this equatorial belt (where most of the plants suitable for indoor use
thrive) is the ____.
a. Tropic of Cancer c. Amazon Basin
b. Tropic of Capricorn d. Northern Temperate Zone