Chapter 2 of 9
Revision Notes
Kingdoms Plantae And Animalia — Revision Notes
NIOS · Class 12 · Biology
Kingdoms Plantae And Animalia revision notes for NIOS Class 12 Biology: 4 topics in quick points. Part of the NIOS Class 12 Biology syllabus.
45 questions38 flashcards5 concepts
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Key Topics to Revise
1
3.1 Kingdom Plantae - Overview and Main Divisions
- Plants are multicellular, eukaryotic, photosynthetic autotrophs (rarely heterotrophs) with cellulosic cell walls
- All plants are embryophytes (have embryos) - this is the defining characteristic separating them from algae
- Kingdom Plantae is divided into three major divisions based on presence/absence of vascular tissue and seeds
2
3.2 Bryophyta - The Amphibians of Plant Kingdom
- Bryophytes complete their life cycle in both water and on land - hence 'amphibians of plant kingdom'
- They lack vascular tissues (no xylem or phloem) - cannot transport water against gravity, limiting height
- Main plant body is GAMETOPHYTIC (haploid) - this is the dominant, independent phase
3
3.3 Pteridophyta - True Vascular Plants Without Seeds
- Pteridophytes (ferns) are lower vascular plants - contain xylem (water transport) and phloem (nutrient transport)
- Main plant body is SPOROPHYTIC (diploid) - the dominant independent phase (opposite to bryophytes)
- Have true roots (penetrate soil), stems (rhizomes - underground horizontal stems), and leaves (fronds)
4
3.4 Spermatophyta - Seed-Producing Plants
- Spermatophyta (sperma = seed, phyte = plant) - the most advanced plant division
- Seeds are the key innovation allowing complete independence from water in reproduction
- All spermatophytes have vascular tissue (xylem and phloem) enabling large terrestrial plants
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Full NotesKey Concepts
Kingdom Plantae consists of multicellularBryophytes are the simplest embryophytes lackingPteridophytes (ferns) are the first plantsSpermatophytes represent the highest divisionAngiosperms are classified into two major
Frequently Asked Questions
What are the important topics in Kingdoms Plantae And Animalia for NIOS Class 12 Biology?
Key topics in Kingdoms Plantae And Animalia include 1 Kingdom Plantae - Overview and Main Divisions, 2 Bryophyta - The Amphibians of Plant Kingdom, 3 Pteridophyta - True Vascular Plants Without Seeds, 4 Spermatophyta - Seed-Producing Plants. Study these first, then practise questions on each for the NIOS Class 12 board exam.
How should I revise Kingdoms Plantae And Animalia for the NIOS Class 12 board exam?
Learn the core ideas first, then work through the 45 practice questions on Kingdoms Plantae And Animalia. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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