The arrangements of ovules within the ov | Class 11 Biology Chapter Morphology of Flowering Plants, Morphology of Flowering Plants NCERT Solutions

Current NCERT chapter

Academic session 2026-27, Chapter 5 in the current curriculum.

Welcome to the NCERT Solutions for Class 11 Biology - Chapter Morphology of Flowering Plants. This page offers a step-by-step solution to the specific question from Exercise 0, Question 5:

The arrangements of ovules within the ovary is known as placentation. What does the term placenta refer to? Name and draw various types of
placentations in the flower as seen in T.S. or V.S.

. 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 5:

The arrangements of ovules within the ovary is known as placentation. What does the term placenta refer to? Name and draw various types of
placentations in the flower as seen in T.S. or V.S.

Answer:

The attachment of ovules within the ovary is known as Placentation. The placenta refers to a flattened, cushion like tissue on which one or more ovules are attached to the inner-surface of ovary wall. It provides nutrition to the embryo. Various types of placentation in the flower are:

  1. Parietal: Occurs in a bi- or multicarpellary but unilocular ovary. Placenta appears as internal ridges on the ovary wall.
  2. Marginal: Occurs in a monocarpellary, unilocular ovary. Placenta develops and ovules are borne along the junction of the two margins of the carpel.
  3. Axile: Occurs in a bi- or multicarpellary and multilocular ovary. Placentae are formed in the center of the ovary by carpel’s margins inward folding by fusing together in the center.  
  4. Free- central: Occurs in multicarpellary but unilocular ovary. Placenta develops in the center of ovary as an upgrowth from ovary base which bears ovules. It may also formed by breaking down of the septa from the initial axile placentation, like in caryophyllaceae.    
  5. Basal: Occurs in a bi- or multicarpellary but unilocular ovary. The ovules are few or reduced to one and borne at the base of the ovary.
  6. Superficial: Occurs in a multicarpellary and multilocular ovary. Ovules are borne on placentae which develops all around the inner surface of the partition wall.

ovary


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 Morphology 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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Welcome to the NCERT Solutions for Class 11 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 0 , Question 5: The arrangements of ovules within the ovary is known as placentation. What does the term placenta re....

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