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Pollination and Fertilization — Concept Maps

ICSE · Class 9 · Biology

4 concept maps of Pollination and Fertilization for ICSE Class 9 Biology, each also written out as a text outline.

43 questions44 flashcards5 concepts

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A comparative diagram illustrating the three main types of pollination: autogamy (self-pollination within the same flower), geitonogamy (pollen transfer between flowers on the same plant), and xenogam
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4 Concept Maps

Process of Fertilization in Flowering Plants

Process of Fertilization in Flowering Plants

The map in words

  • Pollination\nPollen lands on Stigma
    • Pollen Grain Germinates\nStimulated by sugar secretion
      • Pollen Tube Grows\nThrough stigma and style
        • Enters Ovule\nThrough Micropyle
          • Tube Nucleus\nDisintegrates
          • Pollen Tube enters\nSynergid
            • 2 Sperm Nuclei Released
              • Sperm 1 fuses\nwith Egg Cell
                • ZYGOTE formed\nDiploid 2n
                  • EMBRYO develops
                  • DOUBLE FERTILIZATION\nComplete
              • Sperm 2 fuses with\n2 Polar Nuclei
                • ENDOSPERM NUCLEUS\nTriple Fusion 3n
                  • ENDOSPERM develops\nFood for embryo

Process of Fertilization in Flowering Plants

Process of Fertilization in Flowering Plants

The map in words

  • Pollen grain lands on Stigma
    • Pollen grain germinates
      • Pollen tube grows out
        • Generative nucleus divides into 2 Sperm Nuclei
          • Pollen tube travels through Style
            • Pollen tube reaches Ovary
              • Pollen tube enters Ovule via Micropyle
                • Tube nucleus disintegrates
                  • 2 Sperm nuclei released into Embryo Sac
                    • Two Fertilizations
                      • First Sperm Nucleus: Fuses with Egg Cell Nucleus
                        • Zygote formed - develops into Embryo
                          • DOUBLE FERTILIZATION COMPLETE
                      • Second Sperm Nucleus: Fuses with 2 Polar Nuclei
                        • Endosperm Nucleus formed - Triple Fusion

Correct Sequence: From Pollination to Fertilization

Correct Sequence: From Pollination to Fertilization

The map in words

  • Pollen lands on Stigma\nPOLLINATION COMPLETE
    • Pollen Grain Germinates\non Stigma
      • Pollen Tube Grows\nthrough Style
        • Tube Nucleus at Tip\nGuides Tube Growth
          • Generative Nucleus Divides\ninto 2 Sperm Nuclei
            • Pollen Tube enters Ovule\nthrough Micropyle
              • Tube Nucleus\nDisintegrates
                • 2 Sperm Nuclei Released\ninto Embryo Sac
                  • Sperm Nucleus 1\nfuses with Egg Cell
                    • ZYGOTE formed\nBecomes Embryo
                      • DOUBLE FERTILIZATION\nCOMPLETE
                  • Sperm Nucleus 2\nfuses with 2 Polar Nuclei
                    • PRIMARY ENDOSPERM NUCLEUS\nTRIPLE FUSION

Pollination and fertilization in flowering plants

Pollination and fertilization in flowering plants

The map in words

  • Pollination and fertilization in flowering plants
    • Pollination
    • Self-pollination
    • Cross-pollination
    • Agents of cross-pollination
    • Features of pollinated flowers
    • Devices favouring cross-pollination
    • Fertilization
    • Pollen grain

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Frequently Asked Questions

What are the important topics in Pollination and Fertilization for ICSE Class 9 Biology?
Key topics in Pollination and Fertilization include Pollination: Meaning and Types, Devices That Favour Cross-Pollination, Agents of Cross-Pollination, Fertilization and Double Fertilization. Study these first, then practise questions on each for Class 9 exams.
What do the concept maps for Pollination and Fertilization show?
The 4 maps show how the ideas in Pollination and Fertilization connect: Process of Fertilization in Flowering Plants; Process of Fertilization in Flowering Plants. Each map is also written out as an outline on this page.
How should I revise Pollination and Fertilization for Class 9 exams?
Learn the core ideas first, then work through the 43 practice questions on Pollination and Fertilization. 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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