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Assertion : All tissues lying inside va...

Assertion : All tissues lying inside vascular cambium are called as bark.
Reason : Bark is made up of phellogen, phellem and phelloderm lying inside secondary phloem.

A

If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

B

If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.

C

If Assertion is true, but Reason is false.

D

If Assertion is false, but Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
D
Bark consists of all tissues outside the vascular cambium. Phellem, phellogen and phellodern constitute bark.
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Assertion: In the dicot root the vascualr cambium is completely secondary in roigin Reason: Vascular cambium originates from the tissue located just below the phloem bundles a portion of pericycle tissue above the protoxylem forming a complete and contiuous wavy ring, which later becomes circular

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Knowledge Check

  • Assertion: All tissue lying inside the vascular cambium are called as bark. Reason: Bark is made up of phellogen, phellem and phelloderm lying outside the secondary phloem.

    A
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
    B
    If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
    C
    If Assertion is true, but Reason is false.
    D
    Both Assertion and Reason are false.

  • All tissues exterior to vascular cambium is called bark which indudes

    A
    Phellogen + secondary xylem
    B
    Periderm + secondary xylem
    C
    Periderm + secondary phloem
    D
    Cork cambium + primary xylem

  • Assertion :- Vascular cambium of dicot stem shows dual origin. Reason :- Partially it is made up of primary meristem and partially from secondary meristem.

    A
    If both Assertion & Reason are True & Reason is a correct explanation of the Assertion.
    B
    If both Assertion & Reason are True but the Reason is a correct explanation of the Assertion.
    C
    If Assertion is True but the Reason is False.
    D
    If both Assertion & Reason are false.

    • Similar Questions

    Explore conceptually related problems

    Assertion: Fascicular vascular cambium, interfascicular cambium and cork-cambium are examples of lateral meristems. Reason: These are responsible for producing the secondary tissues.

    Which of the following statements are incorrect? (i). Secondary growth usually occurs in monocotyledons. (ii). Bark refers to all tissues interior to vascular cambium. (iii). Lenticels permit the exchange of gases between the outer atmosphere and the internal tissue of the stem. (iv). Annual rings give an estimate of the age of the tree.

    Assertion: Secondary growth usually occurs in dicotyledonous stems. Reason: The vascular cambium present between xylem and phloem possesses the ability to form secondary xylem and secondary phloem respectively.

    State true(T) or false(F) to the given statements and select the correct option. ( a ) All tissue layers exterior to the vascular cambium constitute bark. ( b ) Root podermis is sclerenchymatous. ( c ) Ground tissue of leaves is called mesophyll. ( d ) Due to presence of casparian strips, endodermis is impervious to water.

    Assertion : All proteinaceous enzymes have a three dimensional structure Reason : The secondary struture of protein is according to amino acids present inside the polypeptide

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