Question

1. the extract of which gymnosperm cone is used in weight loss?

ephedra
cycad
ginkgo
pine tree

Explanation:

Ephedra, also known as ma huang, was historically used in weight - loss supplements due to its stimulant properties. However, it has significant health risks. Cycads are often toxic. Ginkgo is mainly associated with cognitive function. Pine trees have uses like in lumber or pine - needle tea (not for weight loss in a significant commercial sense like ephedra was).

Answer:

ephedra