Taxol, a secondary metabolite from the bark of the Pacific yew tree, is used as a treatment for
A. diabetes.
B. breast cancer.
C. indigestion.
D. headaches.
E. high blood pressure.
B. breast cancer.
Many secondary metabolites have medicinal value.
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Diazotrophs maximize nitrogenase activity by
A) closely coupling N2 fixation with high rates of photosynthesis. B) fixing N2 at times when oxygen is absent or in low concentrations. C) producing specialized structures to protect nitrogenase from oxygen. D) producing specialized structures or fixing N2 at times when oxygen is absent to protect nitrogenase from oxygen.
Angiogenesis contributes to carcinogenesis because it
A. allows tumor cells to invade underlying tissues. B. causes additional mutations to occur in tumor cells. C. allows tumor cells to spread to other parts of the body. D. causes blood vessels to grow into the tumor. E. causes apoptosis in tumor cells.
As life forms become more advanced, new properties tend to occur. Therefore, we address these properties as being ________.
Fill in the blank(s) with the appropriate word(s).
Prokaryotic cells may possess _____ that attach them to surfaces.
Fill in the blank(s) with the appropriate word(s).