The bark of the pacific yew tree (taxus brevifolia) was the original source of one of the most effective drugs for treating tumors of the breast, lung, and other sites. taxol, a chemical extracted from this bark, kills actively replicating cells by inhibiting the depolymerization of microtubules. why are microtubules good targets for killing cancerous cells

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics