Extracts from the ginkgo tree are sold in over the counter (OTC) medicines purported to increase memory.Extracts from what other gymnosperm are also sold in OTC medicines, some of which have useful effects and others of which have controversial effects?
A) Archaeopteris
B) Eucalyptus
C) Ephedra
D) Sequoiadendron
E) Welwitschia

Question

Quizplus · Accepted Answer

Ephedra is a gymnosperm whose extracts are used in OTC medicines. It contains ephedrine, which can have both useful and controversial effects, such as weight loss and increased energy, but also potential side effects like increased heart rate and blood pressure.

Extracts from the Ginkgo Tree Are Sold in Over the Counter