Pteridophytes Part 2

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8 Terms

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Telome theory

Theory explaining the evolution of vascular plant organs from dichotomously branched axes called telomes.

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Telome

Ultimate branch of an early vascular plant axis.

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Planation

Telomes arranged in a single plane.

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Origin of megaphylls

Formed by overtopping, planation, and webbing of telomes.

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Origin of microphylls

Formed as small outgrowths from stem surface without leaf gaps.

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Prothallus

Small, heart-shaped gametophyte of ferns.

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Fronds

Megaphyllous leaves of ferns.

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Ecological role of pteridophytes

Contribute to soil formation and stabilization.