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Plant Anatomy: Abnormal Secondary Growth in Stem

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Questions and Answers

What is the abnormal behavior of normal cambium in woody climbers or lianas?

The cambium forms vascular tissues only in the region of the vascular bundle. (correct)
The cambium forms irregular patches of parenchyma in the xylem.
The cambium forms rings of vascular bundles embedded in the parenchyma tissue.
The cambium forms usually a large proportion of vascular tissues only in the region of the vascular bundle.

What is an example of abnormal behavior of normal cambium as mentioned in the text?

The cambium forms vascular tissues only in the region of the vascular bundle.
The cambium forms irregular patches of parenchyma in the xylem. (correct)
Formation of rings of vascular bundles embedded in conjunctive tissues.
The cambium forms usually a large proportion of vascular tissues only in the region of the vascular bundle.

How does abnormal behavior of abnormal cambium result in anomalous structures?

The cambium forms irregular patches of parenchyma in the xylem.
Formation of rings of vascular bundles embedded in the parenchyma tissue. (correct)
Formation of rings of vascular bundles embedded in conjunctive tissues.
The cambium forms vascular tissues only in the region of the vascular bundle.

Where does a new cambium ring or accessory cambium arise from in the abnormal behavior of abnormal cambium?

Cortex (B) Signup and view all the answers

In what plant's stem is an example provided for abnormal behavior of normal cambium?

Cucurbita plant (C) Signup and view all the answers

What is an example of anomalous structure formation due to abnormal behavior of normal cambium?

Formation of rings of vascular bundles embedded in the parenchyma tissue. (C) Signup and view all the answers

What does it mean when vascular bundles are described as 'conjoint'?

The xylem and phloem are side by side (C) Signup and view all the answers

What is the significance of 'open' vascular bundles?

They contain a layer of cells that can divide and grow (D) Signup and view all the answers

What does 'bicollateral' mean in the context of vascular bundles?

There are two cambium layers, one inside and one outside (C) Signup and view all the answers

What happens to the cambium in the abnormal behavior as described in the text?

It only produces cells in the areas of the vascular bundles (B) Signup and view all the answers

In what arrangement are the xylem bundles present in bicollateral bundles?

Sandwiched between two phloem bundles (C) Signup and view all the answers

What characterizes the stem of a Bignonia plant according to the text?

Wavy with noticeable ridges and furrows (D) Signup and view all the answers

What cambium behavior is considered normal at first in the Bignonia stem?

Producing more xylem cells on the inside (B) Signup and view all the answers

What happens to the cambium ring in the Bignonia stem after some time?

It develops areas that only grow in one direction (A) Signup and view all the answers

What change occurs in the cambium activity in the Bauhinia stem according to the text?

It stops producing xylem but continues to produce phloem normally (A) Signup and view all the answers

What is the resulting structure due to the change in cambium activity in the Bauhinia stem?

The layer of secondary phloem becomes thicker (B) Signup and view all the answers

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