Question

1. which of the following is not true concerning rainforests?

a. twenty-five percent of western pharmaceuticals are derived from rainforest ingredients.
b. almost 50,000 rainforest species are lost every year due to deforestation.
c. half of all rainforest plants have been tested for their medicinal properties.
d. projections say rainforest deforestation could eliminate half of the worlds species.

Explanation:

Rainforest plants are vastly understudied for medicinal properties; only a small fraction (not half) have been tested. The other statements are established facts about rainforest pharmaceutical contributions, species loss from deforestation, and extinction projections.

Answer:

c. Half of all rainforest plants have been tested for their medicinal properties.