1 Fluids travel horizontally inward in a tree via ray cells

1. Fluids travel horizontally inward in a tree via ray cells (true/false), explain.

2. Knots always start in the center of the tree (true/false), explain.

3. The dark part of growth ring in a tree is called ___

4. The light part of a growth ring is called ___

5. The light part of the xylem region in a tree is called ____

6. The dark central part of the xylem region in a tree is called ___

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Solution

Thanks for the question.

1. True

Each bordered pit, which is similar toa crosssectional part of the wooden trunk, consists of a dome with a central pore. The pore penetrates the tracheid (which are like multiple radial units in the cross sectional area) wall and aligns perfectly with a pore in the wall of the neighbouring tracheid. This allows fluid to move from tracheid to tracheid

2. False. Knots are seen as circular features in the wood. They represent xylem which is moving at an oblique angle or sideways.

3.In trees, early wood formed in spring contains wider vessels than the wood formed later in the year. The later wood is therefore denser and slightly darker and is called old annual ring. This is the dead part of the tree.

4.The light part of a growth ring is called the new annual ring or a annual growth ring, which represents the new cells formed in one season from the recent times.

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