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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Definitions:

Deforestation

The large-scale removal of trees from forests or jungles, often to clear land for agricultural, residential or commercial development.

Overgrazing

The depletion of vegetation due to continuous feeding by an excessive number of grazing animals, leading to land degradation.

Water Scarcity

A situation in which the available water resources are insufficient to meet the demands of a region.

Precipitation

Any form of water - liquid or solid - falling from the atmosphere to the Earth's surface, including rain, snow, sleet, and hail.