The Root Systems of Trees in Tropical Rain Forests Expand

question 70

Multiple Choice

The root systems of trees in tropical rain forests expand outward from the tree because

• A)the trees are very short and do not need deep roots.
• B)the ground temperatures in tropical forests are too high to allow for deep roots.
• C)there is a shortage of rainfall in the region tends to prohibit effective plant growth.
• D)the ground layer of vegetation in tropical forests is so thick so the roots extract nutrients from the vegetation.
• E)the mineral content of the soil is shallow and hence roots expand laterally rather than vertically to exploit the shallow nutrient layer.

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