L4T3 – Internal Structures of the Stem

Secondary thickening is brought about by

Collenchyma and parenchyma cells

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Vascular cambium and cork cambium

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Cork cambium and sclerenchyma

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Vascular cambium and collenchyma

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Which of the following is not seen in the transverse section of a young monocotyledonous stem?

Parenchyma

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Phloem

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Cambium

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Xylem

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The zone between the epidermis and the pericycle in a dicotyledonous stem is the

phloem

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xylem

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sclerenchyma

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cortex

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The main function of vascular tissues in higher plants is

the movement of food and water

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transpiration pulls

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initiating suction pressure

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the transport of gases and water

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The main difference between dicot stems and monocot stems, is that, dicots have

no cambium

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no vascular bundles

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scattered vascular bundles

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pith

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In which of the following group of plants will the xylem vessels be most poorly developed?

Xerophytes

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Hydrophytes

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Mesophytes

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Savanna plants

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One true characteristic of a dicotyledonous stem is

the vascular bundles are randomly scattered within the cortex

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the cambium is between the cortex and the vascular bundles

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the xylem is more interiorly located than the phloem

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the epidermis is completely enclosed by the cortex

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Which of the following types of xylem does not contain dead cells?

Xylem parenchyma

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Xylem tracheids

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Xylem sclereids

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Xylem vessels

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The plants group that shows secondary growth are the

pteridophytes

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halophytes

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monocotyledons

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dicotyledons

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L4T3 – Internal Structures of the Stem

Timothy Oni December 14, 2023

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