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Chapter 3: Plant Kingdom

NCERT Solutions for CBSE Class 10 Biology — 19 solved questions with detailed explanations.

19

Questions

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Topics

Solved Questions

Q1. Double fertilization is a characteristic feature of:

Gymnosperms
Angiosperms
Pteridophytes
Bryophytes

Difficulty: Easy · Topic: Angiosperms

Solution

Double fertilization is unique to angiosperms: one sperm fuses with egg (zygote), other with polar nuclei (endosperm).

Q2. Alternation of generations means:

only meiosis
diploid and haploid phases alternate
no reproduction
only mitosis

Difficulty: Easy · Topic: Plant Kingdom

Solution

diploid and haploid phases alternate.

Q3. Mosses belong to:

Angiospermae
Bryophyta
Gymnospermae
Pteridophyta

Difficulty: Easy · Topic: Plant Kingdom

Solution

Bryophyta.

Q4. Ferns belong to:

Pteridophyta
Angiospermae
Gymnospermae
Bryophyta

Difficulty: Easy · Topic: Plant Kingdom

Solution

Pteridophyta.

Q5. Chlamydomonas is a:

red alga
diatom
green alga
brown alga

Difficulty: Easy · Topic: Plant Kingdom

Solution

green alga.

Q6. Volvox is a:

diatom
red alga
filamentous alga
colonial green alga

Difficulty: Easy · Topic: Plant Kingdom

Solution

colonial green alga.

Q7. Spirogyra is a:

red alga
brown alga
colonial alga
filamentous green alga

Difficulty: Easy · Topic: Plant Kingdom

Solution

filamentous green alga.

Q8. Marchantia is a:

moss
fern
gymnosperm
liverwort (bryophyte)

Difficulty: Easy · Topic: Plant Kingdom

Solution

liverwort (bryophyte).

Q9. Fucus is a:

brown alga
red alga
green alga
diatom

Difficulty: Easy · Topic: Plant Kingdom

Solution

brown alga.

Q10. Porphyra is a:

green alga
red alga
brown alga
diatom

Difficulty: Easy · Topic: Plant Kingdom

Solution

red alga.

Q11. Selaginella is a:

bryophyte
gymnosperm
pteridophyte
angiosperm

Difficulty: Easy · Topic: Plant Kingdom

Solution

pteridophyte.

Q12. Pinus is a:

gymnosperm
angiosperm
pteridophyte
bryophyte

Difficulty: Easy · Topic: Plant Kingdom

Solution

gymnosperm.

Q13. Cycas belongs to:

Pteridophyta
Angiospermae
Bryophyta
Gymnospermae

Difficulty: Easy · Topic: Plant Kingdom

Solution

Gymnospermae.

Q14. Bryophytes are called amphibians of the plant kingdom because:

They live in water
They need water for sexual reproduction
They have no roots
They are small

Difficulty: Easy-Medium · Topic: Bryophytes

Solution

Bryophytes live on land but require water for fertilization (swimming of antherozoids). Hence 'amphibians of plant kingdom'.

Q15. The dominant phase in the life cycle of a fern is:

Gametophyte
Sporophyte
Prothallus
Spore

Difficulty: Easy-Medium · Topic: Pteridophytes

Solution

In pteridophytes (ferns), the sporophyte (diploid) is the dominant phase. The gametophyte (prothallus) is small and independent.

Q16. Algae are classified based on:

number of cells
size
habitat
type of pigment

Difficulty: Easy-Medium · Topic: Plant Kingdom

Solution

type of pigment.

Q17. Red algae contain pigment:

phycocyanin
phycoerythrin
fucoxanthin
chlorophyll only

Difficulty: Easy-Medium · Topic: Plant Kingdom

Solution

phycoerythrin.

Q18. Brown algae contain pigment:

xanthophyll
phycoerythrin
fucoxanthin
phycocyanin

Difficulty: Easy-Medium · Topic: Plant Kingdom

Solution

fucoxanthin.

Q19. Gymnosperms have:

spores only
no seeds
naked seeds
enclosed seeds

Difficulty: Easy-Medium · Topic: Plant Kingdom

Solution

naked seeds.

Other Chapters in Biology

Ch 1: The Living World Ch 2: Biological Classification Ch 4: Animal Kingdom Ch 5: Morphology of Plants Ch 6: Anatomy of Plants Ch 7: Structural Organisation in Animals Ch 8: Cell Unit of Life Ch 9: Biomolecules Ch 10: Cell Cycle Ch 11: Transport in Plants Ch 12: Mineral Nutrition Ch 13: Photosynthesis Ch 14: Respiration in Plants Ch 15: Plant Growth Ch 16: Digestion & Absorption Ch 17: Breathing & Gas Exchange Ch 18: Body Fluids & Circulation Ch 19: Excretory Products Ch 20: Locomotion & Movement Ch 21: Neural Control Ch 22: Chemical Coordination

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