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Woody stems _____.


have clusters of xylem and phloem

have bark, cambium, and sapwood

support coneflowers and pepper plants

are generally soft and green
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How is the age of a tree estimated?


Pairs of light and dark rings representing yearly growth are counted.

Thin rings representing known droughts are added up.

The total number of light and dark rings are counted.

Wide annual rings are subtracted from narrow annual rings.
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Which tissue layer of a woody stem contains active xylem?


cambium

heartwood

sapwood

bark
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Woody stems _____.


are generally soft and green

have bark, cambium, and sapwood

support coneflowers and pepper plants

have clusters of xylem and phloem
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Herbaceous stems _____.


are hard and rigid

have annual rings

do not contain xylem

do not contain wood
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What is the function of heartwood?


It contains the active xylem.

It provides support for the tree.

It produces new vascular tissue.

It protects the inside of the tree.
Answered by GPT 3.5
are generally hard and brown
Answered by GPT 3.5
Pairs of light and dark rings representing yearly growth are counted.
Answered by GPT 3.5
The tissue layer of a woody stem that contains active xylem is the sapwood.
Answered by GPT 3.5
have clusters of xylem and phloem
Answered by GPT 3.5
do not contain wood
Answered by GPT 3.5
The function of heartwood is to provide support for the tree.