Plant Kingdom — Class 11 MCQs with Answers
Class 11 CBSE Biology · Chapter 3
90 practice questions · 30 Easy · 30 Medium · 30 Hard · Updated
Practise the most important Class 11 CBSE Biology questions from Chapter 3, "Plant Kingdom". You get 9 timed quizzes made from 90 NCERT-based MCQs, with answers and explanations. The questions are split into 30 Easy, 30 Medium and 30 Hard. Warm up on the basics, then move on to the exam-level questions that set top scorers in CBSE & Maharashtra HSC Board exams, MHT-CET and NEET UG apart.
To score well in "Plant Kingdom", focus on diagrams, key terms and knowing NCERT line by line. Each MCQ here is timed and uses exam-style marking (+4 correct, −1 wrong, 0 skipped). This trains you to stay accurate under time pressure, as real papers need. Every question has a short explanation, so a wrong answer becomes a quick lesson. It is the fastest way to fix gaps before a test.
Use this chapter for focused revision. Start with the Easy set to check your basics on Plant Kingdom, then move to Medium and Hard to practise applying them. Your accuracy, streaks and XP save automatically. This chapter also adds to your overall Class 11 Biology mastery score. 14 sample questions are solved in full below, with the answer and a worked explanation. Sign in free to start practising.
Key concepts: Plant Kingdom (Class 11 Biology)
The plant kingdom runs from simple thalloid algae to complex flowering plants, a series marked by the rise of vascular tissue, seeds and flowers. Central to it is alternation of generations — the haploid gametophyte and diploid sporophyte — whose relative dominance shifts as land adaptation increases.
- Algae
- Chlorophyll-bearing, simple thalloid autotrophs, mostly aquatic. Reproduce vegetatively, asexually by spores, or sexually — isogamous, anisogamous or oogamous.
- Classes of algae
- Chlorophyceae (green; chlorophyll a, b), Phaeophyceae (brown; fucoxanthin) and Rhodophyceae (red; r-phycoerythrin) — the pigment sets them apart.
- Stored food in algae
- Green algae store starch, brown algae store laminarin and mannitol, red algae store floridean starch. Agar, algin and carrageenan are algal products.
- Bryophytes
- 'Amphibians of the plant kingdom' (mosses, liverworts) — live on land but need water for sperm to reach the egg. Lack true roots, stems and vascular tissue.
Plant Kingdom — important questions & MCQs with answers (Class 11 Biology)
14 solved questions from this chapter's difficulty levels, each with its answer and explanation. The other 76 are timed and scored when you sign in.
- Q1Easy
Spirogyra is a:
A.FungusB.Green alga✓ CorrectC.BryophyteD.GymnospermAnswer: B. Green alga
Explanation: Spirogyra is a filamentous freshwater green alga (Chlorophyceae) with helical chloroplasts — not a fungus (no chlorophyll), a bryophyte (no thallus differentiation) or a gymnosperm (no seeds).
- Q2Easy
Kingdom Plantae includes all of the following EXCEPT:
A.AlgaeB.BryophytesC.Fungi✓ CorrectD.AngiospermsAnswer: C. Fungi
Explanation: Kingdom Plantae covers algae, bryophytes, pteridophytes, gymnosperms and angiosperms — all photosynthetic eukaryotes. Fungi are heterotrophic and lack chlorophyll, so they sit in a separate kingdom.
- Q3Easy
Gametophyte is:
A.Diploid (2n)B.Haploid (n)✓ CorrectC.TriploidD.Polyploid alwaysAnswer: B. Haploid (n)
Explanation: The gametophyte is the haploid (n) generation that produces gametes directly by mitosis, not meiosis — the diploid sporophyte is the one that undergoes meiosis to form spores.
- Q4Easy
Bryophytes are amphibians of plant world because:
A.They are aquatic onlyB.They live in desertsC.They have flowersD.They need water for fertilisation✓ CorrectAnswer: D. They need water for fertilisation
Explanation: Bryophytes are called amphibians of the plant kingdom because although the plant lives on land, its flagellate sperm must swim through a film of water to reach the egg for fertilisation.
- Q5Easy
Plant kingdom is classified mainly on the basis of:
A.Plant body, vascular tissue, seed, fruit✓ CorrectB.ColourC.Habitat onlyD.Size onlyAnswer: A. Plant body, vascular tissue, seed, fruit
Explanation: Plant classification rests on plant body organisation, presence of vascular tissue, and whether seeds are naked or enclosed in fruit — not on superficial traits like colour or size.
- Q6Easy
Sporophyte is:
A.Produces gametesB.HaploidC.Always single-celledD.Diploid (2n) and produces spores by meiosis✓ CorrectAnswer: D. Diploid (2n) and produces spores by meiosis
Explanation: The sporophyte arises from fusion of gametes, so it is diploid (2n); it produces haploid spores by meiosis, unlike the gametophyte, which is haploid and produces gametes by mitosis.
- Q7Medium
First land plants with vascular tissue:
A.Pteridophytes (ferns)✓ CorrectB.BryophytesC.AngiospermsD.AlgaeAnswer: A. Pteridophytes (ferns)
Explanation: Pteridophytes (ferns, Selaginella) are the first plants to evolve true xylem and phloem, unlike bryophytes which lack vascular tissue and rely on simple parenchyma for conduction.
- Q8Medium
Eichler classified the plant kingdom into:
A.Algae and FungiB.Monera and ProtistaC.Cryptogamae and Phanerogamae✓ CorrectD.Mosses and FernsAnswer: C. Cryptogamae and Phanerogamae
Explanation: Eichler (1883) split the plant kingdom into Cryptogamae (non-seed-bearing: algae, bryophytes, pteridophytes) and Phanerogamae (seed-bearing) — not kingdom-level groups like Monera.
- Q9Medium
Haplontic life cycle is found in:
A.*Spirogyra* (most algae)✓ CorrectB.AngiospermsC.GymnospermsD.PteridophytesAnswer: A. *Spirogyra* (most algae)
Explanation: A haplontic life cycle keeps the haploid gametophyte dominant, with the zygote as the only diploid cell, which undergoes meiosis immediately — typical of most algae such as Spirogyra.
- Q10Medium
Gymnosperms have:
A.FlowersB.Fruit covering seedsC.Vascular bundles onlyD.Naked seeds✓ CorrectAnswer: D. Naked seeds
Explanation: Gymnosperms bear naked seeds sitting exposed on megasporophylls, as in Cycas and Pinus cones, with no ovary or fruit wall around them — angiosperms instead enclose seeds inside a fruit.
- Q11Medium
Artificial systems of plant classification give equal weightage to:
A.Only DNAB.Only flowersC.Only rootsD.Vegetative and sexual characters✓ CorrectAnswer: D. Vegetative and sexual characters
Explanation: Linnaeus's artificial system relied on gross, superficial features and gave equal weight to vegetative and sexual characters, unlike natural systems such as Bentham & Hooker's.
- Q12Hard
Most evolved plants:
A.Angiosperms✓ CorrectB.GymnospermsC.BryophytesD.AlgaeAnswer: A. Angiosperms
Explanation: Angiosperms are the most evolved plants: they have flowers, double fertilisation, and seeds enclosed in a fruit, giving greater reproductive efficiency and diversity than gymnosperms.
- Q13Hard
Assertion: Bryophytes do not have true vascular tissue. Reason: They lack xylem and phloem.
A.A false, R trueB.Both A and R true; R does not explain AC.A true, R falseD.Both A and R true; R explains A✓ CorrectAnswer: D. Both A and R true; R explains A
Explanation: Bryophytes truly lack lignified xylem and phloem, so water and food move through simple, undifferentiated tissue instead of true vascular bundles — the reason correctly explains the assertion.
- Q14Hard
In angiosperms, the dominant phase is:
A.NeitherB.GametophyteC.Both equallyD.Sporophyte (diploid)✓ CorrectAnswer: D. Sporophyte (diploid)
Explanation: In angiosperms the diploid sporophyte is the dominant, visible plant body; the gametophyte is reduced to a tiny embryo sac and pollen grain — the reverse of the bryophyte pattern.
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Start this chapter free →Plant Kingdom — FAQs
What are the key concepts in Class 11 Biology Plant Kingdom?+
The plant kingdom runs from simple thalloid algae to complex flowering plants, a series marked by the rise of vascular tissue, seeds and flowers. Central to it is alternation of generations — the haploid gametophyte and diploid sporophyte — whose relative dominance shifts as land adaptation increases. Key ideas include Algae, Classes of algae, Stored food in algae, Bryophytes.
What does Class 11 Biology Chapter 3 (Plant Kingdom) cover on XamBaaz?+
It has 90 NCERT-based MCQs on "Plant Kingdom": 30 Easy, 30 Medium and 30 Hard. Together they make 9 timed quizzes, and you never get the same set twice. Every question has an instant explanation. They help you prepare for CBSE & Maharashtra HSC Board exams, MHT-CET and NEET UG.
Are these "Plant Kingdom" questions free to practise?+
Yes. Sign in with Google to practise "Plant Kingdom" free. Full unlimited access is ₹999/year on a launch offer until 1 December 2026. No chapter is charged separately.
How should I revise "Plant Kingdom" for the exam?+
Start with the Easy quiz to check your basics, then try Medium and Hard to practise applying them. There are 9 timed quizzes on this chapter, so you can come back for a fresh set instead of one you have seen. Read each explanation, retry the questions you miss, and track your accuracy until it stays high.
Are these "Plant Kingdom" MCQs available with answers?+
Yes. 14 sample questions are shown here in full, each with the correct option and a step-by-step "Why" explanation. Sign in free with Google to start practising, with instant scoring.
Is there negative marking in the "Plant Kingdom" quizzes?+
Yes. The timed quizzes use exam-style marking: +4 for a right answer, −1 for a wrong one and 0 for a skip, the same negative marking as NEET UG. MHT-CET and CBSE board papers have no negative marking. Our mocks for those are scored their way.
What are the important questions from Plant Kingdom (Class 11 Biology)?+
The questions that matter most test Algae, Classes of algae, Stored food in algae, Bryophytes. This page shows 14 solved important MCQs with answers and explanations; all 90 questions on the chapter are available as timed quizzes once you sign in.
Is there an online quiz for Plant Kingdom?+
Yes — Class 11 Biology Plant Kingdom has timed online quizzes at Easy, Medium and Hard levels, with instant scoring and a worked explanation on every question. The first quiz on the chapter is free.