You will get here Science Biology class 12 CBSE notes Chapter 1: Sexual reproduction in flowering plants. You can connect with us for every important update related to class 12.
Science Biology is a very important subject for you because it will help you increase your percentage as well as it is an important subject for your medical entrance exam. You can score high marks in this subject by studying notes and practicing MCQs. In this post, we will cover Chapter 1: Sexual reproduction in flowering plants.
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Key Content Of Chapter 1 Sexual reproduction in flowering plants
- Sexual reproduction in flowering plants involves fusion of male and female gametes.
- Flower is the main reproductive organ of plants.
- It has two parts: Androecium (male) and Gynoecium (female).
- Pollen grains (male gametophyte) are formed in anther by microsporogenesis.
- Embryo sac (female gametophyte) is formed inside ovule by megasporogenesis.
- Pollination = transfer of pollen from anther to stigma.
- Types of pollination:
- Autogamy (same flower)
- Geitonogamy (same plant)
- Xenogamy (different plant)
- Pollination agents: wind, water, insects, animals.
- Pollen germinates on stigma and forms pollen tube.
- Male gametes travel through pollen tube to ovule.
- Double fertilisation occurs:
- One gamete + egg → Zygote
- One gamete + polar nuclei → Endosperm
- After fertilisation:
- Ovule → Seed
- Ovary → Fruit
- Endosperm provides nutrition to embryo.
- Embryo develops into new plant.
- Special processes:
- Apomixis → seed formation without fertilisation
- Polyembryony → more than one embryo in a seed
👉 Flow: Flower → Pollination → Fertilisation → Seed → Fruit
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Class 12 Science Biology Chapter 1: Sexual reproduction in flowering plants Notes
Sexual Reproduction in Flowering Plants
Class 12 Biology Chapter 1 – Pulse by Anubhav
Complete notes, NCERT book PDF aur updated syllabus yahan se easily access karo.
Yeh chapter flower structure, pollination, double fertilisation aur seed formation ko detail me explain karta hai — exam ke liye super important 🔥
Class 12 Biology Chapter 1 Sexual reproduction in flowering plants MCQs
Sexual Reproduction in Flowering Plants (MCQs) – Pulse by Anubhav
1. What is the main purpose of reproduction?
A. Growth
B. Continuity of species
C. Respiration
D. Digestion
2. Reproductive organ of flowering plants?
A. Stem
B. Root
C. Flower
D. Leaf
3. Male reproductive part is:
A. Ovary
B. Androecium
C. Gynoecium
D. Style
4. Female reproductive part is:
A. Filament
B. Anther
C. Gynoecium
D. Pollen
5. Pollen formation occurs by:
A. Fertilisation
B. Microsporogenesis
C. Megasporogenesis
D. Germination
6. Embryo sac is:
A. Seed
B. Female gametophyte
C. Male gametophyte
D. Fruit
7. Pollination means:
A. Germination
B. Transfer of pollen to stigma
C. Seed formation
D. Fusion of gametes
8. Double fertilisation occurs in:
A. Animals
B. Flowering plants
C. Bacteria
D. Fungi
9. Ovule develops into:
A. Fruit
B. Seed
C. Stem
D. Leaf
10. Ovary develops into:
A. Fruit
B. Seed
C. Leaf
D. Root
Score: 0 / 10
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FAQs About Sexual reproduction in flowering plants
FAQs About Sexual Reproduction in Floowering Plants – Pulse by Anubhav
What is sexual reproduction in flowering plants?
Sexual reproduction is the process where male and female gametes fuse to form a zygote, leading to the formation of seeds and fruits.
What is the role of a flower in reproduction?
The flower is the reproductive organ of plants and contains male (androecium) and female (gynoecium) parts necessary for reproduction.
What is pollination?
Pollination is the transfer of pollen grains from the anther to the stigma of a flower.
What is double fertilisation?
Double fertilisation is a process where one male gamete fuses with the egg to form a zygote and the other fuses with polar nuclei to form endosperm.
What develops into seed and fruit?
Ovule develops into seed and ovary develops into fruit after fertilisation.
What is apomixis?
Apomixis is the formation of seeds without fertilisation, similar to asexual reproduction.
Class 12 Biology Notes – All Chapters (Pulse by Anubhav)
| Chapter | Topic | Open |
|---|---|---|
| Chapter I | Sexual Reproduction in Flowering Plants | View → |
| Chapter II | Human Reproduction | View → |
| Chapter III | Reproductive Health | View → |
| Chapter IV | Principles of Inheritance and Variation | View → |
| Chapter V | Molecular Basis of Inheritance | View → |
| Chapter VI | Evolution | View → |
| Chapter VII | Human Health and Disease | View → |
| Chapter VIII | Microbes in Human Welfare | View → |
| Chapter IX | Biotechnology: Principles and Processes | View → |
| Chapter X | Biotechnology and its Applications | View → |
| Chapter XI | Organisms and Populations | View |
| Chapter XII | Ecosystem | View → |
| Chapter XIII | Biodiversity And Conservation | View → |
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