Mature white pines intercept almost all the sunlight that

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Mature white pines intercept almost all the sunlight that [#permalink]

09 Dec 2003, 17:30

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Mature white pines intercept almost all the sunlight
that shines on them. They leave a deep litter that
dries readily, and they grow to prodigious height so
that, even when there are large gaps in a stand of
such trees, little light reaches the forest floor. For this
reason white pines cannot regenerate in their own
shade. Thus, when in a dense forest a stand of trees
consists of nothing but mature white pines, it is a fair
bet that ____.

Which one of the following most logically concludes
the argument?

(A) the ages of the trees in the stand do not differ
from each other by much more than the length
of time it takes a white pine to grow to
maturity
(B) the land on which the stand is now growing had
been cleared of all trees at the time when the
first of the white pines started growing
(C) competition among the trees in the stand for
sunlight will soon result in some treesтАЩ dying
and the stand thus becoming thinner
(D) other species of trees will soon begin to colonize
the stand, eventually replacing all of the white
pines
(E) any differences in the heights of the trees in the
stand are attributable solely to differences in
the ages of the trees

:roll:

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09 Dec 2003, 17:34

B ?

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09 Dec 2003, 18:27

author states that '..white pines can't regenerate in their own shade..' so, the growers must have cleared that land before sowing...or whatever.

B

sunniboy,
indeed your avatar is distracting

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09 Dec 2003, 18:36

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09 Dec 2003, 19:10

A, I reckon.

it says mature white pines intercept almost all the sunlight, so what you cannot have are immature trees-- since they will have no available light. As the question states "white pines cannot regenerate in their own
shade" Hence, the trees must have "grown up" at the same time.

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09 Dec 2003, 19:28

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09 Dec 2003, 20:05

stoolfi wrote:

well..well, these questions are really messy.. :roll:

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10 Dec 2003, 00:07

B and E are too strong, using such quantifies as ANY and ALL.

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10 Dec 2003, 01:45

its C....coz
A and E are out coz nothing is discussed abt age in para. B and D
are out of scope.

my 2 cents...
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10 Dec 2003, 04:58

I was thinking about A and B, but now I agree that B sounds too strong :oops:

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10 Dec 2003, 09:04

I agree with A.

B is indeed to strong.

[#permalink] 10 Dec 2003, 09:04

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Mature white pines intercept almost all the sunlight that

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