From where are some successful drugs like taxol and Tamiflu derived?

Taxol and Tamiflu are both derived from wild plants, emphasizing the significant role that biodiversity plays in drug development. Taxol, for instance, is a compound that was originally isolated from the bark of the Pacific yew tree, demonstrating how natural sources can yield important medicinal compounds. Similarly, Tamiflu, used to treat influenza, is derived from a substance found in certain wild species. This highlights the intrinsic value of wild plants in pharmaceuticals, underscoring the importance of conserving natural habitats to maintain the biodiversity that can lead to future medical discoveries.

The other options pertain to agricultural or biotechnological contexts which may not directly relate to the sources of these specific drugs. Genetically modified cultivars and mutations in wheat cultivars focus on cultivated species and agricultural practices rather than the use of wild plants as sources for pharmaceuticals. The intrinsic value of wild species does reflect the importance of biodiversity but does not specifically indicate the source of these drugs, making the direct reference to wild plants the most precise answer.