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Practice Reading: Multiple Choice, Single Answer ID: #39461 Roots anchor
Instructions ›
Read the text and answer the multiple-choice question by selecting the correct response. Only one response is correct.
Roots anchor the plant in one of two ways or sometimes by a combination of the two. The first is by occupying a large volume of shallow soil around the plant's base with a fibrous root system, one consisting of many thin, profusely branched roots. Since these kinds of roots grow relatively close to the soil surface, they effectively control soil erosion. Grass roots are especially well suited to this purpose. Fibrous roots capture water as it begins to percolate into the ground and so must draw their mineral supplies from the surface soil before the nutrients are leached to lower levels.

The phrase "this purpose" in the passage refers to

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Result:

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Option 3: "preventing soil erosion"

Explanation: This option is correct because the phrase 'this purpose' refers to the function of fibrous roots in effectively controlling soil erosion, as stated in the text. The roots' ability to occupy shallow soil and their structure are specifically mentioned in relation to preventing erosion.

Option 1: "combining two root systems"

Explanation: This option is incorrect because the phrase 'this purpose' does not refer to the combination of root systems. The text discusses how roots anchor the plant and control soil erosion, not the act of combining different types of root systems.

Option 2: "feeding the plant"

Explanation: This option is incorrect as 'this purpose' does not relate to feeding the plant. The text focuses on the role of fibrous roots in controlling soil erosion rather than their function in nutrient absorption.

Option 4: "leaching nutrients"

Explanation: This option is incorrect because 'this purpose' does not refer to leaching nutrients. The text indicates that fibrous roots capture water and draw minerals from the surface soil before nutrients are leached, but this is not the purpose being referred to.

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