1. The dated material consisted of a piece of exterior wood containing about 30 annual growth rings . 2. Cross section of the phalanx bones shows annual growth rings which may be used for determining age. 3. Annual growth rings indicate the animal's age.4. Annual growth rings in herbs are usually only visible by means of a microscope and a specific staining method.5. AWI defines quartersawn lumber as having annual growth ring orientation between 60-90 degrees relative to the face of the board. 6. The trunk consists of thousands of small fibers and lacks annual growth rings , making it difficult to determine the tree's age. 7. The newly created xylem is the annual growth rings There may also be rays running at right angles to growth rings. 8. Scientists have discovered that they can read annual growth rings in fossilized bones as accurately as the growth rings found in trees. 9. The ages of the animals came from counting annual growth rings in the bones, a common feature in fish, reptiles and dinosaurs. 10. "We'll probably pull the otoliths _ the ear bones _ to help us age them; they have annual growth rings like a tree.
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