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  • In dicot stem, each vascular bundle isOption: 1 Conjoint, open, and with endarch protoxylemOption: 2</s

In dicot stem, each vascular bundle is

Option: 1

Conjoint, open, and with endarch protoxylem


Option: 2

Conjoint and open


Option: 3

Conjoint and exarch protoxylem


Option: 4

Open and exarch protoxylem


Answers (1)

  •  The innermost layer of the cortex is called the endodermis. The cells of the endodermis are rich in starch grains and the layer is also referred to as the starch sheath.
  • The pericycle is present on the inner side of the endodermis and above the phloem in the form of semilunar patches of sclerenchyma.
  • In between the vascular bundles, there are a few layers of radially placed parenchymatous cells, which constitute medullary rays.
  • A large number of vascular bundles are arranged in a ring.
  • Each vascular bundle is conjoint, open, and with endarch protoxylem.
    • "Conjoint" means that both xylem and phloem are present within the same vascular bundle.
    • "Open" indicates that there is no cambium between the xylem and phloem in the bundle.
    • "Endarch protoxylem" means that the first-formed xylem is located towards the center of the vascular bundle.
  • Hence, option 1 is the correct answer.

 

 

                                                        Structure of dicot stem 

 

Posted by

Ramraj Saini

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