Set 3: Command of Evidence (Intermediate)

Explanation

Answer: B

PASSAGE

Invasive species often lack natural predators in their new environment, allowing their populations to grow unchecked. This can devastate native ecosystems. For example, the introduction of the brown tree snake to Guam led to the extinction of several native bird species.

What characteristic of invasive species allows them to dominate new environments?

A. They are smaller than native species.

B. They face fewer predators that would control their population.✓ Correct

C. They cannot survive outside their native habitat.

D. They improve biodiversity.

Detailed Explanation

This question requires you to identify evidence that supports a claim. The text says invasive species 'lack natural predators in their new environment, allowing their populations to grow unchecked.' The best evidence directly and explicitly supports the stated claim without requiring assumptions. Match specific textual details or data points to the claim being made. The correct answer provides clear, direct support. Strong evidence directly addresses the claim without requiring additional interpretation. When evaluating options, look for quotes or data that explicitly support the statement. Weak evidence may be tangentially related but doesn't provide direct proof.

Key Evidence:

• "lack natural predators"

• "populations to grow unchecked"

Why others are wrong: A (Size is not mentioned.), C (They clearly DO survive outside their native habitat.), D (They 'devastate' ecosystems, reducing biodiversity.).

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