文档介绍：(T)1. Allicin, allitridin and ajoene are believed to have anti-carcinogenica activity and normalize plasma lipid levels, blood pressure, and fibrinolytic activity.
(F)2. The standardized extracts of Ginkgo biloba leaves have been used widely as a dietary supplement in Europe and as a phytomedicine in the USA.
(T)3. The new directive would guarantee a premarketing check of product quality and safety by the health authorities and facilitate recalls.
(T)4. Now the nonmedical practitioners who prescribe herbal treatments have to receive adequate training and continuous education to reach and maintain a high standard of practice in the United Kingdom.
(F)5. The conventional efficacy requirements are only means of safeguarding public health.
(F)6. This maturation zone is driven by hydrostatic pressure within the cell that propels the root tip deeper into the soil.
(T)7. Endodermal cells possess a characteristic thickening of the anticlinal cell wall.
(F)8. All plants first form a secondary root and for most plants, including the gymnosperms, primitive dicotyledons and eudicotyledons, this persists as a taproot.
(T) 9. The petals are usually colored, which can attract insects’ attention.
(F)10. Animal-pollinated flowers are often very small without sepals or petals, many also being monoecious.
(T)11. In Chinese folk medicine, Ku-Ding-Cha was mostly used to treat coronary hea