NCERT Solutions for Class 11 Biology Chapter 6

Anatomy of Flowering Plants Class 11

Chapter 6 Anatomy of Flowering Plants Exercise Solutions

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Exercise : Solutions of Questions on Page Number : 99

Q1 :  

State the location and function of different types of meristem.


Answer :

Meristems are specialised regions of plant growth. The meristems mark the regions where active cell division and rapid division of cells take place. Meristems are of three types depending on their location.

Apical meristem

It is present at the root apex and the shoot apex. The shoot apical meristem is present at the tip of the shoots and its active division results in the elongation of the stem and formation of new leaves. The root apical meristem helps in root elongation.

Intercalary meristem

It is present between the masses of mature tissues present at the bases of the leaves of grasses. It helps in the regeneration of grasses after they have been grazed by herbivores. Since the intercalary meristem and the apical meristem appear early in a plant's life, they constitute the primary meristem.

Lateral meristem

It appears in the mature tissues of roots and shoots. It is called the secondary meristem as it appears later in a plant's life. It helps in adding secondary tissues to the plant body and in increasing the girth of plants. Examples include fascicular cambium, interfascicular cambium, and cork cambium

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Q2 :  

Cork cambium forms tissues that form the cork. Do you agree with this statement? Explain.


Answer :

When secondary growth occurs in the dicot stem and root, the epidermal layer gets broken. There is a need to replace the outer epidermal cells for providing protection to the stem and root from infections. Therefore, the cork cambium develops from the cortical region. It is also known as phellogen and is composed of thin-walled rectangular cells. It cuts off cells toward both sides. The cells on the outer side get differentiated into the cork or phellem, while the cells on the inside give rise to the secondary cortex or phelloderm. The cork is impervious to water, but allows gaseous exchange through the lenticels. Phellogen, phellem, and phelloderm together constitute the periderm.

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Q3 :  

Explain the process of secondary growth in stems of woody angiosperm with help of schematic diagrams. What is the significance?


Answer :

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Q4 :  

Draw illustrations to bring out anatomical difference between

(a) Monocot root and dicot root

(b) Monocot stem and dicot stem


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Q5 :  

Cut a transverse section of young stem of a plant from your school garden and observe it under the microscope. How would you ascertain whether it is a monocot stem or dicot stem? Give reasons.


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Q6 :  

The transverse section of a plant material shows the following anatomical features, (a) the vascular bundles are conjoint, scattered and surrounded by sclerenchymatous bundle sheaths (b) phloem parenchyma is absent. What will you identify it as?


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Q7 :  

Why are xylem and phloem called complex tissues?


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Q8 :  

What is stomatal apparatus? Explain the structure of stomata with a labelled diagram.


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Q9 :  

Name the three basic tissue systems in the flowering plants. Give the tissue names under each system.


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Q10 :  

How is the study of plant anatomy useful to us?


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Q11 :  

What is periderm? How does periderm formation take place in dicot stem?


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Q12 :  

Describe the internal structure of a dorsiventral leaf with the help of labelled diagrams.


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<< Previous Chapter 5 : Morphology of Flowering Plants Next Chapter 7 : Structural Organisation in Animals >>

Biology : CBSE NCERT Exercise Solutions for Class 11th for Anatomy of Flowering Plants will be available online in PDF book form soon. The solutions are absolutely Free. Soon you will be able to download the solutions.

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