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Anatomy of Flowering Plants question

2023 · Q30
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Anatomy of Flowering Plants question

2023 · Q30

NEETBiologyAnatomy of Flowering PlantsMCQ+4 / −1

Given below are two statements :

Statement I : Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body.

Statement II : Exarch condition is the most common feature of the root system.

In the light of the above statements, choose the correct answer from the options given below:

  1. A
    Both Statement I and Statement II are false
  2. B
    Statement I is correct but Statement II is false
  3. C
    Statement I is incorrect but Statement II is true
  4. D
    Both Statement I and Statement II are true
View written solutionFree

Correct answer: C

Statement I : Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body.

  • This statement is incorrect. Endarch and exarch are used to describe the developmental sequence of primary xylem, not secondary xylem. In endarch condition, the first formed xylem is towards the centre (protoxylem) and the last formed xylem is towards the periphery (metaxylem), which is typical of stems. In the exarch condition, the first formed xylem is towards the periphery and the last formed xylem is towards the centre, which is typical of roots.

Statement II : Exarch condition is the most common feature of the root system.

  • This statement is true. The exarch condition, where the first-formed xylem is towards the periphery and the last-formed xylem is towards the centre, is indeed the most common feature of the root system.

So, the correct answer is :

Option C : Statement I is incorrect but Statement II is true.

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