Annual Growth Rings in Trees Are the Result of What

question 3

Multiple Choice

Annual growth rings in trees are the result of what?

• A)the cyclical growth and death of ground tissues in the phloem
• B)the seasonal variation in vascular cambium, consisting of the development of thin cell walls in secondary xylem in the spring and thicker cells walls in secondary xylem in the fall.
• C)the annual variation in rapid growth in the apical meristems that results in the thickening of the cork cambium layers.

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Definitions:

Amines

Organic compounds and functional groups that contain a basic nitrogen atom with a lone pair, derived from ammonia by replacement of one or more hydrogen atoms with organic groups.

Trimethylamine

A nitrogen-containing organic compound characterized by a strong fishy odor, used in the synthesis of various chemical products.

3-Pentanamine

A chemical compound characterized by a five-carbon chain with an amine group attached to the third carbon.

Reaction

A process in which substances interact to form new compounds or to change their physical or chemical properties.