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

What is periderm? How does periderm form | Class 11 Biology Chapter Anatomy of Flowering Plants, Anatomy of Flowering Plants NCERT Solutions

Welcome to the NCERT Solutions for Class 11 Biology - Chapter Anatomy of Flowering Plants. This page offers a step-by-step solution to the specific question from Exercise 1, Question 11: . With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 11: What is periderm? How does periderm formation take place in dicot stem?

Answer:

Periderm is composed of the phellogen, phellem, and phelloderm.

During secondary growth, the outer epidermal layer and the cortical layer are broken because of the cambium. To replace them, the cells of the cortex turn meristematic, giving rise to cork cambium or phellogen. It is composed of thin-walled, narrow and rectangular cells.

Phellogen cuts off cells on its either side. The cells cut off toward the outside give rise to the phellem or cork. The suberin deposits in its cell wall make it impervious to water. The inner cells give rise to the secondary cortex or phelloderm. The secondary cortex is parenchymatous.

Other Questions of Chapter Anatomy of Flowering Plants

Q: How is the study of plant anatomy useful to us?

Arrange the following in the sequence you would find them in a plant starting from the periphery – phellem, phellogen, phelloderm.

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

Point out the differences in the anatomy of, leaf of peepal (Ficus religiosa) and maize (Zea mays). Draw the diagrams and label the differences.

Q: 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.

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

Product of photosynthesis is transported from the leaves to various parts of the plants and stored in some cell before being utilised. What are the cells/ tissues that store them?

Epidermal cells are often modified to perform specialized functions in plants. Name some of them and the function they perform.

Q: 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?

Q: Draw illustrations to bring out anatomical difference between
(a) Monocot root and dicot root
(b) Monocot stem and dicot stem

Popular questions of class 11 Biology

Q: Describe briefly the four major groups of Protozoa.

Q: Why are living organisms classified?

Q: State two economically important uses of: (a) Heterotrophic bacteria (b) Archaebacteria

Q: What is the difference between direct and indirect development?

Define a taxon. Give some examples of taxa at different hierarchical levels.

Q: Describe the important properties of enzymes.

What are the steps involved in formation of a root nodule?

Q: Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal.

Q: How is a key helpful in the identification and classification of an organism?

Q: Define and understand the following terms:
(i) Phylum
(ii) Class
(iii) Family
(iv) Order
(v) Genus

Recently Viewed Questions of Class 11 Biology

Name the pathological condition when uncontrolled cell division occurs.

Aquatic animals generally are ammonotelic in nature where as terrestual forms are not. Comment.

Name the cells/tissues in human body which
a. exhibit ameboid movement
b. exhibit ciliary movement

How do you distinguish between a skeletal muscle and a cardiac muscle?

Q: Explain the term thecodont and diphyodont.

Why earthworm is called the friend of farmer?

Q: Draw the labelled diagram of the following:
(i) Gram seed
(ii) V.S. of maize seed

Which of the following is correct:
(a) Cells of all living organisms have a nucleus.
(b) Both animal and plant cells have a well defined cell wall.
(c) In prokaryotes, there are no membrane bound organelles.
(d) Cells are formed de novo from abiotic materials.

Mitosis results in producing two cells which are similar to each other. What would be the consequence if each of the following irregularities
occur during mitosis?
a. Nuclear membrane fails to disintegrate
b. Duplication of DNA does not occur
c. Centromeres do not divide
d. Cytokinesis does not occur.

Q: Discuss with your teacher about
(i) haploid insects and lower plants where cell-division occurs, and
(ii) some haploid cells in higher plants where cell-division does not occur.

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

Read the question carefully and focus on the core concept being asked.
Reference examples and data from the chapter when answering questions about Anatomy of Flowering Plants.
Review previous year question papers to get an idea of how such questions may be framed in exams.
Practice answering questions within the time limit to improve your speed and accuracy.
Discuss your answers with your teachers or peers to get feedback and improve your understanding.

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Comments

Srasti Poojary
Oct 10, 2019

Ur site is helping me a lot

Sanaya
Aug 07, 2019

Jyada achaa Ni tha

Sonakshi
Mar 19, 2019

I feel that your answer is absolutely correct... awesome

Prapti baruah
Sep 24, 2018

mja..correct

Anurag Kanu
Sep 12, 2018

Bekar not to the point ð¯

Geeta Devi
Jul 22, 2018

Issme Dicot stem ka figure bna sakte hai.

Pawan
Mar 27, 2018

It na bada likhna knife jaruri that

Lilly
Sep 13, 2017

Not to the point answer.., I'm totally unsatisfied by this :(

biologist
Jun 15, 2017

wrong answer.........