Which of the following is not true about taxol and the Pacific yew tree?

Question

BlackTom AI · Accepted Answer

Quinault people historically used the Pacific yew for medicinal and other traditional purposes, so the statement that they have no traditional use for the tree is false.

1) Relevant knowledge points and concepts
- Taxol (paclitaxel) is a chemotherapy compound originally isolated from the bark of the Pacific yew (Taxus brevifolia).
- Ethnobotany: Indigenous peoples of the Pacific Northwest, including the Quinault, used local plant species for medicine and material culture; the Pacific yew had recognized traditional uses.
- Conservation and harvesting: Harvesting bark for taxol had ecological implications; growers and researchers assessed optimal tree sizes and cultivation difficulty.

2) Step-by-step evaluation of each option
- Option A: "The Pacific yew tree has important ecological functions in the forest." True. Yew is part of understory structure, provides habitat, and its seeds and foliage interact with wildlife and forest dynamics.
- Option B: "The Quinault Native Americans have no traditional use for the tree." This is false. Ethnobotanical records show Pacific Northwest tribes, including the Quinault, used parts of Taxus brevifolia for medicinal and other traditional applications prior to the commercial discovery of taxol.
- Option C: "The optimal diameter for trees to be harvested for taxol is 10"." This is consistent with historical harvesting practice: harvesters targeted small-to-moderate diameter trees (around 10 inches DBH) because they provided usable bark while minimizing effort and maximizing yield-per-tree in the context of wild-collection methods.
- Option D: "The Pacific yew tree does not grow well in tree farms" True in general: Pacific yew is slow-growing and proved difficult to cultivate at scale compared with other timber species, which complicated commercial production of taxol from plantation-grown trees.

3) Calculations/intermediate steps
No numerical calculations are required; the reasoning is comparative and factual.

4) Why the correct answer is correct
Because documented traditional uses by the Quinault and other Pacific Northwest tribes contradict the absolute claim that they had no traditional use. That makes the statement untrue.

5) Why the other options are incorrect (briefly)
- A, C, and D reflect accurate points about ecological role, historical harvesting practices (approx. 10" DBH targeting), and cultivation difficulties, so they are true statements and thus not the correct choice for “not true.”

6) Conclusion
Therefore, the false statement is "The Quinault Native Americans have no traditional use for the tree," matching the provided answer.

Which of the following is not true about taxol and the Pacific yew tree?Single choice

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