3) most angiosperms have alternate phyllotaxy. what allows each leaf to get the maximum exposure to light and reduces shading of lower leaves? a) a leaf area index above 8 b) self-pruning c) one leaf only per node d) leaf emergence at an angle of 137.5°f from the site of previous leaves e) a leaf area index above 8 and leaf emergence at an angle of 137.5°f from the site of previous leaves