Chapter 17: The Evolution of Plant and Fungal Diversity 14.
Figure 17.18B on page 364 of your textbook illustrates an elegant experiment that tests the
hypothesis that a plant's “sym” genes are necessary to form mycorrhizae with fungi. Clearly
indicate the following: what hypothesis they were testing, how they tested their hypothesis, and
identify their control and their results.

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

it would lead to upper respiratory infections and pneumonia.

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

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