If Lignin-Containing Cell Walls Had Not Evolved in Land Plants

question 207

Multiple Choice

If lignin-containing cell walls had not evolved in land plants, we might now have

• A) fields of tall plants that have rhizoids but lack stomata.
• B) forests of tall animals instead of tall plants.
• C) plants that grow underground instead of upward.
• D) the same plant communities that we have now, because they would still have cellulose walls.
• E) land areas of the planet covered with mats of low-lying plants and no trees.

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