Which law of evolution states that "Warmblooded" mammals of hot and humid areas have abundant melanin pigment

Options

A. Dollo's Law
B. Gloger's Law
C. Cope's Law
D. Gause's Law

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about a specific law of evolution that relates to the presence of melanin pigment in warm-blooded mammals living in hot and humid areas.

2. **Identifying the Relevant Law**: The law that addresses the adaptation of organisms, particularly the presence of melanin in mammals in hot climates, is known as Glover's Law. This law suggests that warm-blooded mammals in such environments tend to have higher levels of melanin, which provides protection against the sun's harmful rays.

3. **Explaining Melanin's Role**: Melanin is a pigment responsible for coloration in skin, hair, and eyes. In warm climates, increased melanin helps in protecting the skin from UV radiation, which is more intense in these areas.

4. **Contrasting with Other Laws**: While Glover's Law pertains specifically to melanin and adaptation to climate, other laws of evolution, such as Dola's Law (which states that evolution is irreversible) and Kopp's Law (which states that organisms tend to increase in size over time), do not directly relate to the question.

5. **Conclusion**: Therefore, the answer to the question is Glover's Law, which states that warm-blooded mammals of hot and humid areas have abundant melanin pigment.

**Final Answer**: Glover's Law.

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