manhattan cr tree rings 13

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manhattan cr tree rings 13

by pradeepkaushal9518 » Sat Sep 11, 2010 9:58 pm
trunk is generally true. However, to help regulate the internal temperature of the tree, the outermost layers of wood of the Brazilian ash often peel away when the temperature exceeds 95 degrees Fahrenheit, leaving the tree with fewer rings than it would otherwise have. So only if the temperature in the Brazilian ash's environment never exceeds 95 degrees Fahrenheit will its rings be a reliable measure of the tree's age.

Which of the following is an assumption on which the argument above depends?

The growth of new rings in a tree is not a function of levels of precipitation.
Only the Brazilian ash loses rings because of excessive heat.

Only one day of temperatures above 95 degrees Fahrenheit is needed to cause the Brazilian ash to lose a ring.

The internal rings of all trees are of uniform thickness.
The number of rings that will be lost when the temperature exceeds 95 degrees Fahrenheit is not predictable.
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by vishalj » Sat Sep 11, 2010 10:55 pm
IMO A (The growth of new rings in a tree is not a function of levels of precipitation. )

If the growth of new rings happens for other reason such as precipitation, then we can't find the tree's age with full certainity.

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by ov25 » Thu Sep 16, 2010 4:01 pm
imo A

another condition did not cause the effect

Why not E?
Even though >95F is predictable, inorder for us to reliably measure the age of the tree we need additional info as to how many years did the temp exceed 95. So NO, this is not an assumption