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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

Both Assertion and Reason are false.

Text Solution

Verified by Experts

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

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.

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

Assertion (A): Complex tissues are made up of more than one type of cells. Reason (R): Vascular tissues in plants are a type of complex tissues.

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

CENGAGE BIOLOGY-TISSUES -MANDATORY EXERCISE (EXERCISE SET II)
  1. Matrix of cartilage contains and of bone protein.

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  2. Match the Column A with Column B .

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  3. Assertion : All tissues lying inside vascular cambium are called as b...

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  4. Assertion : Permanent tissue is composed of mature cells. Reason : ...

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  5. Assertion : Apical and intercalary meristems contribute to the growth...

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  6. Assertion : In collateral vascular bundles phloem is situated toward ...

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  7. Assertion: In dicot stem, the vascular bundles are open. Reason: Ca...

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  8. Assertion: Exocrine gland are without ducts secrete hormones passing d...

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  9. Assertion: Every living organism is not multicellular. Reason: Few m...

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  10. Assertion: Node of Ranvier occur in myelin nerve fibre. Reason: Mye...

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  11. Assertion. Whales can live in cold water as they have a thick coat of...

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  12. Different between exocrine and endocrine glands

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  13. Mark the odd word in each group: Sarcoplasm, sarcomere, neurilemma, sa...

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  14. Mark the odd word in each group: Cyton, actin, axon, dendron

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  15. Mark the odd word in each group: RBC, WBC, platelets, cartilage

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  16. Note the relationship between the first two words and suggest a suitab...

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  17. Note the relationship between the first two words and suggest a suitab...

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  18. Note the relationship between the first two words and suggest a suitab...

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  19. Nerve impulses come to the cell body of a neuron along it................

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  20. Name the types of agranulocytes.

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