1.3 Stems

Which of the following is NOT a function of stems?

• Stems support the plant.

• Stems are nutrient pathways.

• Stems produce new living tissue and grow.

• Stems are the main area of photosynthesis in a plant.

How are dicot stems different from dicot roots?

• Dicot stems have vascular bundles arranged in a circle.

• Dicot stems have cambium for secondary growth.

• Dicot stems do not have a cortex.

• Dicot stems do not have an epidermis.

Which of the following pictures shows a dicot stem?

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Which of the following pictures shows a monocot stem?

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What happens to the pith of a dicot stem over time?

• It grows larger to accomodate more nutrients being stored over the plant's lifetime.

• It remains the same while the xylem and phloem expand around it.

• It becomes smaller and smaller as it is crushed by lateral growing xylem tissue.

• It becomes xylem as the cells die at functional maturity.

Which of the following is true of monocot stems?

• Monocot stems do not have a clearly defined cortex or pith.

• Monocot stems experience secondary growth later in the plants life cycle than dicot stems.

• Monot stems have their vascular bundles in a semicircular arrangement.

• Monocot stems are incapable of storing food or water.

What is the function of number 3 in the picture shown?

• It transports water.

• It transports organic material.

• It provides structural support for the vascular bundle.

• It is the point of secondary growth.

Which of the numbers may represent the vascular cambium?

• 2

• 3

• 4

• 5

What is sapwood in a woody stem?

• Sapwood is the old and dead xylem in the stem.

• Sapwood is the living xylem in the stem.

• Sapwood is the area of growth for new xylem in the stem.

• None of these answers are correct.

What is the bark composed of on woody stems?

• Dead phloem

• Living phloem

• Periderm

• All of the above