NEET Exam > NEET Notes > Biology Class 12 > Important Diagrams: Sexual Reproduction in Flowering Plants
Important Diagrams: Sexual Reproduction in Flowering Plants | Biology Class 12 - NEET PDF Download
1. A Flower
Parts of a Flower2. Section of a Young Anther and a Dehisced Anther
3. Formation of a Pollen Grain (Microsporogenesis)
Stages of Maturation of Pollen Grain4. Structure of a Mature Pollen Grain
Structure of a Mature Pollen Grain5. Types of Pistil and Anatropous Ovule
6. Formation of an Egg Cell (Megasporogenesis and Megagametogenesis)
7. Pollination
8. Types of Pollination (Abiotic and Biotic)
Types of Pollination : Wind, Water and Insect 9. Pollen-Pistil Interaction
(a) Pollen grains germinating on the stigma; (b) Pollen tubes growing through the style
Pollen Pistil Interaction10. Double Fertilisation
11. Types and Development of Embryo
Types of Embryo12. Types of Seeds and Fruits
Diagram Based Previous Year Questions - NEET
Q1: Identify the correct description about the given figure : [NEET 2024]
(a) Wind pollinated plant inflorescence showing flowers with well exposed stamens.
(b) Water pollinated flowers showing stamens with mucilaginous covering.
(c) Cleistogamous flowers showing autogamy.
(d) Compact inflorescence showing complete autogamyAns: (a)
The given diagram shows a wind pollinated plant showing compact inflorescence and well exposed stamens.
Stamens are exposed so complete autogamy does not occur.
Q 2: What is the function of the tapetum in the anther?
a) Production of pollen grains
b) Protection of microspores
c) Nutrient supply to developing pollen grains
d) Attachment of the anther to the filament
Ans: c) Nutrient supply to developing pollen grains.
Solution.
- The tapetum is a specialised cell layer within the anther surrounding developing microsporangia (pollen sacs).
- It provides nourishment and regulatory molecules required for pollen grain formation and contributes materials to pollen wall formation (exine).
Q 3: The region of the ovule where the integuments join is known as_______.
a) Micropyle
b) Hilum
c) Chalaza
d) Funicle
Ans: c) Chalaza
Solution.
Structure of Anatropous Ovule
- The region of the ovule where the integuments and nucellus are joined is the chalaza.
- The chalaza is located at the base of the ovule, opposite the micropyle.
Q4: A typical angiosperm embryo sac at maturity is:
(a) 7-nucleate and 7-celled
(b) 8-nucleate and 8-celled
(c) 8-nucleate and 7-celled
(d) 7-nucleate and 8-celledAns. c)
Solution.
Structure of Embryo Sac
- The mature embryo sac (typical Polygonum type) contains three antipodal cells at the chalazal end and the egg apparatus (one egg + two synergids) at the micropylar end - these are six cells, each with one nucleus.
- The central cell contains two polar nuclei, giving a total of seven cells but eight nuclei in the embryo sac.
- Hence, the embryo sac is 7‐celled and 8‐nucleate.
The document Important Diagrams: Sexual Reproduction in Flowering Plants | Biology Class 12 - NEET PDF Download is a part of the NEET Course Biology Class 12.
All you need of NEET at this link: NEET
72 videos|304 docs|173 tests |
FAQs on Important Diagrams: Sexual Reproduction in Flowering Plants - Biology Class 12 - NEET PDF Download
| 1. What are the main parts of a flower involved in sexual reproduction? |  |
Ans. The main parts of a flower involved in sexual reproduction include the stamen (which consists of the anther and filament), the pistil (which consists of the stigma, style, and ovary), petals, and sepals. The stamen produces pollen grains, while the pistil contains the ovules that develop into seeds after fertilization.
| 2. What is microsporogenesis and its significance in the formation of pollen grains? | |
Ans. Microsporogenesis is the process through which microspores are formed from microsporocytes (pollen mother cells) through meiosis in the anther. Each microspore then undergoes mitosis to develop into pollen grains. This process is significant because pollen grains are essential for the transfer of male gametes to the female ovule during fertilization.
| 3. How does pollination occur in flowering plants? | |
Ans. Pollination occurs when pollen grains from the anther are transferred to the stigma of a flower. This can happen through various agents such as wind, water, insects, birds, or animals. Successful pollination is crucial for fertilization to occur, leading to the formation of seeds and fruit.
| 4. What is double fertilization, and why is it important in flowering plants? | |
Ans. Double fertilization is a unique process in flowering plants where one sperm cell fertilizes the egg cell, forming a zygote, while another sperm cell fuses with two polar nuclei to form the triploid endosperm. This endosperm serves as a nutrient source for the developing embryo, making double fertilization essential for the successful development of seeds.
| 5. What is the structure of an anatropous ovule, and how does it relate to fertilization? | |
Ans. An anatropous ovule is characterized by its curved shape, where the micropyle (opening) is positioned close to the funiculus (stalk). This structure allows for efficient penetration by the pollen tube during fertilization. The ovule contains the embryo sac, where the egg cell and synergids are located, playing a crucial role in the fertilization process.
About this Document
1.7K Views
4.94/5 Rating
Feb 19, 2026 Last updated
Document Description: Important Diagrams: Sexual Reproduction in Flowering Plants for NEET 2026 is part of Biology Class 12 preparation. The notes and questions for Important Diagrams: Sexual Reproduction in Flowering Plants have been prepared according to the NEET exam syllabus. Information about Important Diagrams: Sexual Reproduction in Flowering Plants covers topics like and Important Diagrams: Sexual Reproduction in Flowering Plants Example, for NEET 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Important Diagrams: Sexual Reproduction in Flowering Plants.
Introduction of Important Diagrams: Sexual Reproduction in Flowering Plants in English is available as part of our Biology Class 12 for NEET & Important Diagrams: Sexual Reproduction in Flowering Plants in Hindi for Biology Class 12 course. Download more important topics related with notes, lectures and mock test series for NEET Exam by signing up for free. NEET: Important Diagrams: Sexual Reproduction in Flowering Plants | Biology Class 12 - NEET PDF Download
Description
Full syllabus notes, lecture & questions for Important Diagrams: Sexual Reproduction in Flowering Plants | Biology Class 12 - NEET PDF Download - NEET | Plus exercises question with solution to help you revise complete syllabus for Biology Class 12 | Best notes, free PDF download
Information about Important Diagrams: Sexual Reproduction in Flowering Plants
In this doc you can find the meaning of Important Diagrams: Sexual Reproduction in Flowering Plants defined & explained in the simplest way possible. Besides explaining types of Important Diagrams: Sexual Reproduction in Flowering Plants theory, EduRev gives you an ample number of questions to practice Important Diagrams: Sexual Reproduction in Flowering Plants tests, examples and also practice NEET tests
Related Searches
Viva Questions, Semester Notes, Important Diagrams: Sexual Reproduction in Flowering Plants | Biology Class 12 - NEET PDF Download, mock tests for examination, shortcuts and tricks, Important Diagrams: Sexual Reproduction in Flowering Plants | Biology Class 12 - NEET PDF Download, study material, Exam, Previous Year Questions with Solutions, MCQs, Sample Paper, past year papers, Important questions, Free, Summary, Important Diagrams: Sexual Reproduction in Flowering Plants | Biology Class 12 - NEET PDF Download, ppt, video lectures, Extra Questions, pdf , Objective type Questions, practice quizzes;