Why Do Most Angiosperms Have Alternate Phyllotaxy, with Leaf Emergence

question 49

Multiple Choice

Why do most angiosperms have alternate phyllotaxy, with leaf emergence at an angle of 137.5° compared to leaves above and below?

• A) to allow maximum exposure to light
• B) to promote a leaf area index above 8
• C) to reduce shading of lower leaves
• D) to allow maximum exposure to light and to reduce shading of lower leaves

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