Some Slow-Growing Trees Have Leaves That Are High in Lignin

question 39

Multiple Choice

Some slow-growing trees have leaves that are high in lignin. The most likely advantage of lignin to such trees is that lignin

• A) has a low C:N ratio, and thus it enriches the soil in its immediate vicinity.
• B) kills certain microorganisms that are needed for plants with high growth rates, protecting the trees from competitive exclusion.
• C) has high concentrations of phosphorus, which is necessary for slow-growing trees.
• D) slows the rate of decomposition, thereby lowering the fertility of the soil and allowing the trees to outcompete plants with high growth rates.

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