BIO NMDCAT Darwinism

nmdcat.online July 14, 2026

In a study of lizards, a researcher finds that individuals with longer tails are easily caught by predators, while those with shorter tails cannot balance properly while running. What type of selection is operating on tail length?

A. Directional selection

B. Disruptive selection

C. Stabilizing selection

✓

D. Balancing selection

📝 Explanation

Because both phenotypic extremes (very long and very short tails) are selected against, stabilizing selection acts to maintain intermediate tail lengths.

📖 Additional Information

Directional selection
Disruptive selection
Stabilizing selection
Balancing selection

Because both phenotypic extremes (very long and very short tails) are selected against, stabilizing selection acts to maintain intermediate tail lengths.

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