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While other species of trees that grow nearby suffer rot, bare bristlecone pines can endure, even after death, often still standing on their roots, for many centuries.
Rather than rot, exposed wood, on living and dead trees, erodes like stone due to wind, rain, and freezing, which creates unusual forms and shapes.
In addition, ratios of stable carbon isotopes from bristlecone pine tree rings are sensitive to past variations in moisture availability.
This information can be used to reconstruct precipitation changes in the past.
The bristlecone pine is extremely drought tolerant due to its branched shallow root system, its waxy needles, and thick needle cuticles that aid in water retention.The other two species, Pinus balfouriana and Pinus aristata are also long-lived, though not to the extreme extent of P.longaeva; specimens of both have been measured or estimated to be up to 3,000 years old.Grading satisfactory/unsatisfactory Average Completion Time 9 months Supplementary Course Materials none Objectives and Content The goal of this course is to enable students to make informed choices about effective self-defense strategies in order to increase their personal safety. After completing this lesson, students will be able to a. After completing this lesson, students will be able to a. After completing this lesson, students will be able to a.discuss safety issues while working with readers, drivers, and helpers b. identify the vital striking areas of an opponent Lesson 7 focuses on specific self-defense techniques. describe how to apply offensive strikes to various scenarios d.