Last Updated on June 6, 2025 by XAM CONTENT
To succeed in Class 12 Biology exams, a strong grasp of Chapter 1 – Sexual Reproduction in Flowering Plants is essential. Our comprehensive collection of chapterwise MCQ questions with answers for Class 12 Biology is designed according to the latest syllabus and exam guidelines, ensuring targeted preparation and better performance. It is a part of MCQ Questions for CBSE Class 12 Biology Series.
These multiple-choice questions will help you assess your knowledge, improve accuracy, and boost confidence for your exams. Whether you are preparing for school tests, online tests or competitive exams, these Sexual Reproduction in Flowering Plants MCQs will strengthen your conceptual clarity.
| Chapter | Sexual Reproduction in Flowering Plants |
| Book | Biology for Class 12 |
| Type of Questions | MCQ Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 12 |
| Subject | Biology |
| Useful for | Class 12 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 12 Biology Chapterwise MCQ Questions |
MCQ Questions on Sexual Reproduction in Flowering Plants Class 12 Biology (PDF Download)
MCQs
Q1. Which part of the stamen provides nourishment to the developing pollen grains?
(a) Endothecium
(b) Tapetum
(c) Middle layer
(d) Epidermis
Show Answer
Answer: (b)
Explanation: Tapetum is the innermost layer of the microsporangium wall and provides nutrition to developing pollen grains.
Q2. What is the functional significance of sporopollenin in pollen grains?
(a) Facilitates fertilization
(b) Promotes water absorption
(c) Protects pollen from harsh environmental conditions
(d) Assists in germination
Show Answer
Answer: (c)
Explanation: Sporopollenin is highly resistant to physical and chemical damage, ensuring pollen durability.
Q3. Which one of the following processes ensures genetic variation during microsporogenesis?
(a) Mitosis
(b) Fertilization
(c) Meiosis
(d) Cytokinesis
Show Answer
Answer: (c)
Explanation: Meiosis during microsporogenesis leads to genetic recombination and variation in pollen grains.
Q4. The characteristic feature of embryo sac in most angiosperms is:
(a) 7-nucleate and 8-celled
(b) 8-nucleate and 7-celled
(c) 7-nucleate and 7-celled
(d) 8-nucleate and 8-celled
Show Answer
Answer: (b)
Explanation: A mature embryo sac typically has 8 nuclei but only 7 cells, including a central cell with two nuclei.
Q5. Why are cleistogamous flowers always self-pollinated?
(a) Because they are visited by specific insects
(b) Because they remain open
(c) Because they never open and stigma contacts pollen inside
(d) Because they are unisexual
Show Answer
Answer: (c)
Explanation: Cleistogamous flowers do not open, ensuring that pollen is transferred to the stigma of the same flower.
Q6. Pollen grains of rice and wheat lose viability within:
(a) 24 hours
(b) 2 hours
(c) 30 minutes
(d) 1 hour
Show Answer
Answer: (c)
Explanation: Pollen grains of cereals like rice and wheat are viable for only about 30 minutes after release.
Q7. Which of the following prevents autogamy in a plant with bisexual flowers?
(a) Stigma and anther maturing at same time
(b) Homomorphic flowers
(c) Self-incompatibility
(d) Cleistogamy
Show Answer
Answer: (c)
Explanation: Self-incompatibility is a genetic mechanism that prevents self-pollen from fertilizing the ovules.
Q8. The role of synergids in the embryo sac is to:
(a) Fertilize egg cell
(b) Nourish antipodals
(c) Attract and guide the pollen tube
(d) Form zygote
Show Answer
Answer: (c)
Explanation: Synergids possess a filiform apparatus that helps attract and guide the pollen tube into the embryo sac.
Q9. What is the product of triple fusion in flowering plants?
(a) Zygote
(b) Embryo
(c) Endosperm
(d) Seed coat
Show Answer
Answer: (c)
Explanation: Triple fusion results in the formation of the primary endosperm nucleus, which develops into the endosperm.
Q10. In embryo development, the first cell to divide is the:
(a) Egg
(b) Endosperm cell
(c) Zygote
(d) Polar nucleus
Show Answer
Answer: (c)
Explanation: After fertilization, the zygote undergoes mitotic divisions to begin embryogenesis.
Q11. Which part of the seed remains as a small pore and allows entry of water and oxygen during germination?
(a) Hilum
(b) Chalaza
(c) Micropyle
(d) Funicle
Show Answer
Answer: (c)
Explanation: The micropyle is a tiny opening in the seed coat through which water and oxygen enter during germination.
Q12. Which of the following is an example of a false fruit?
(a) Mango
(b) Papaya
(c) Apple
(d) Tomato
Show Answer
Answer: (c)
Explanation: In apple, the thalamus contributes to fruit formation, making it a false fruit.
Q13. What ensures that only compatible pollen grains complete fertilization?
(a) Pollen morphology
(b) Pollen-pistil interaction
(c) Pollination agent
(d) Exine strength
Show Answer
Answer: (b)
Explanation: Pollen-pistil interaction involves recognition of compatible pollen and either promotion or inhibition of fertilization.
Q14. Why is apomixis beneficial in agriculture?
(a) Reduces crop quality
(b) Prevents hybrid seed production
(c) Maintains hybrid vigor over generations
(d) Causes variability in progeny
Show Answer
Answer: (c)
Explanation: Apomixis allows propagation of hybrid traits without segregation, making it economically valuable.
Q15. Which structure is involved in guiding the pollen tube into the synergid?
(a) Egg cell
(b) Polar nuclei
(c) Filiform apparatus
(d) Antipodals
Show Answer
Answer: (c)
Explanation: The filiform apparatus in the synergid directs the pollen tube for double fertilization.
Q16. In which pollination type does genetically different pollen land on the stigma?
(a) Autogamy
(b) Geitonogamy
(c) Xenogamy
(d) Cleistogamy
Show Answer
Answer: (c)
Explanation: Xenogamy involves cross-pollination between different plants, bringing genetic diversity.
Q17. The coconut water we drink is an example of:
(a) Cellular endosperm
(b) Nucellus
(c) Free-nuclear endosperm
(d) Embryo
Show Answer
Answer: (c)
Explanation: Coconut water represents free-nuclear endosperm before cell wall formation.
Q18. Polyembryony refers to:
(a) Presence of many ovaries
(b) Development of more than one embryo in a seed
(c) Presence of multiple ovules in a flower
(d) Formation of many seeds in a fruit
Show Answer
Answer: (b)
Explanation: Polyembryony is the occurrence of more than one embryo in a single seed.
Q19. Why are endosperms formed before embryos in angiosperms?
(a) To promote germination
(b) To develop seed coat
(c) To nourish the developing embryo
(d) To attract pollinators
Show Answer
Answer: (c)
Explanation: Endosperm provides nutrition to the embryo during its development.
Q20. In artificial hybridisation, bagging is done to:
(a) Promote self-pollination
(b) Increase fruit size
(c) Prevent contamination of stigma by unwanted pollen
(d) Stimulate seed dormancy
Show Answer
Answer: (c)
Explanation: Bagging ensures that the stigma only receives pollen from the desired male parent in controlled hybridisation.
We hope the given mcq questions with Answers for Sexual Reproduction in Flowering Plants Class 12 helps you in your learning.
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Topics from which mcq questions may be asked
- Pre-fertilization events
- Double fertilization
- Seed and fruit formation
Reproduction in flowering plants ensures species continuity and diversity.
Frequently Asked Questions (FAQs) on Sexual Reproduction in Flowering Plants MCQ Questions
Q1: What is the best way to prepare for Class 12 Biology MCQ questions?
A1: The best way is to study NCERT concepts thoroughly, practice topicwise MCQs regularly. Solving previous year MCQs and mock tests can boost accuracy and speed.
Q2: Are NCERT questions enough for Class 12 Biology MCQ-based exams?
A2: NCERT forms the base for all CBSE Physics MCQs. However, for better preparation, students should solve additional MCQs from reference books and practice HOTS and competency-based questions to develop better understanding.
Q3: Where can I find chapterwise Class 12 Biology MCQ questions with answers?
A3: You can find chapterwise MCQ questions with answers and detailed explanations on trusted educational platforms like xamcontent.com and physicsgurukul.com. These cover both basic and advanced-level questions.
Q4: Do CBSE Class 12 exams include MCQs?
A4: Yes, as per the latest CBSE exam pattern, objective questions, including MCQs, are part of the final exam paper. MCQs test conceptual understanding and application skills.
Q5: How to score high in Class 12 Biology MCQs?
A5: To score high, understand the theory from NCERT, solve a variety of MCQs (basic and conceptual), and regularly revise theory. Avoid guesswork and focus on time management during tests.
