Why is the spread of living pteridophytes limited and restricted to narrow geographical regions?
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Correct answer: The gametophytes require water for fertilization and cool, damp places to grow.
The prothallus needs moist and shady conditions to survive, and more importantly, water is essential for the flagellated antherozoids to reach the archegonia for fertilization. This dual requirement restricts their ecological distribution.
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More Pteridophyte Structural Features questions
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