Class 12 Biology — Chapter 1: Sexual Reproduction in Flowering Plants
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Practise Class 12 Biology Chapter 1, "Sexual Reproduction in Flowering Plants", with 90 NCERT-aligned multiple-choice questions. The set is split into 30 Easy, 30 Medium and 30 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams and NEET UG.
"Sexual Reproduction in Flowering Plants" is one of the chapters where diagram-based recall, terminology and NCERT line-by-line accuracy really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Sexual Reproduction in Flowering Plants, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 12 Biology mastery score. A few sample questions are shown below; sign in free to practise all 90.
Key concepts: Sexual Reproduction in Flowering Plants (Class 12 Biology)
This chapter covers the structure of flowers, the formation of male and female gametophytes, pollination, double fertilisation, and seed and fruit development.
- Flower as reproductive unit
- The stamen (anther + filament) is male; the pistil (stigma, style, ovary) is female.
- Gametophyte development
- Microsporogenesis forms pollen grains (male gametophyte); megasporogenesis forms the embryo sac (female gametophyte, typically 7-celled, 8-nucleate).
- Pollination
- Transfer of pollen to the stigma — self (autogamy) or cross (xenogamy); plants have outbreeding devices to promote cross-pollination.
- Double fertilisation
- One male gamete fuses with the egg (forms zygote, 2n); the other fuses with two polar nuclei (forms triploid endosperm, 3n).
- Post-fertilisation events
- The ovule becomes the seed and the ovary becomes the fruit; phenomena like apomixis and polyembryony also occur.
💡 Exam tips for Sexual Reproduction in Flowering Plants
- Remember double fertilisation: syngamy (egg + sperm → 2n zygote) AND triple fusion (2 polar nuclei + sperm → 3n endosperm).
- The embryo sac is 7-celled but 8-nucleate (the central cell has two polar nuclei).
Sample questions
Male reproductive part of flower:
Stamen = anther + filament.
Double fertilisation in angiosperms produces:
One sperm fertilises egg, other fuses with central cell.
Apomixis is:
Useful for hybrid seed industry.
Sexual Reproduction in Flowering Plants — FAQs
What are the key concepts in Class 12 Biology Sexual Reproduction in Flowering Plants?+
This chapter covers the structure of flowers, the formation of male and female gametophytes, pollination, double fertilisation, and seed and fruit development. Key ideas include Flower as reproductive unit, Gametophyte development, Pollination, Double fertilisation, Post-fertilisation events.
What does Class 12 Biology Chapter 1 (Sexual Reproduction in Flowering Plants) cover on XamBaaz?+
It covers 90 NCERT-aligned MCQs on "Sexual Reproduction in Flowering Plants" — 30 Easy, 30 Medium and 30 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams and NEET UG.
Are these "Sexual Reproduction in Flowering Plants" questions free to practise?+
Yes — sign in with Google to practise "Sexual Reproduction in Flowering Plants" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Sexual Reproduction in Flowering Plants" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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