The Evolutionary Origin of Microphylls Is Thought by Some Biologists

question 135

Multiple Choice

The evolutionary origin of microphylls is thought by some biologists to be

• A) sterile sporangia developing into small blades of photosynthetic tissue.
• B) rhizoids developing into complex networks.
• C) specialized xylem branching into flat blades.
• D) photosynthetic tissue growing between complex branching patterns.
• E) simple strands of vascular tissue.

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