Which of the following demonstrates sexual dimorphism?

• A. Bacteria, which reproduce asexually through binary fission
• B. Peacocks, where males have vibrant plumage and females have duller feathers
• C. Earthworms, where both individuals possess male and female reproductive organs
• D. Hydra, which can reproduce through budding

Answer: (B)

Verified step by step guidance

1. Understand the concept of sexual dimorphism: Sexual dimorphism refers to differences in appearance between males and females of the same species, often related to size, color, or structure.
2. Identify the reproductive methods of the organisms listed: Bacteria reproduce asexually through binary fission, Earthworms are hermaphrodites possessing both male and female reproductive organs, and Hydra can reproduce asexually through budding.
3. Recognize that sexual dimorphism is typically observed in species with distinct male and female individuals, often involving sexual selection.
4. Examine the example of Peacocks: Male peacocks have vibrant plumage, which is a classic example of sexual dimorphism, as it differs significantly from the duller feathers of female peacocks.
5. Conclude that Peacocks demonstrate sexual dimorphism, as they exhibit clear differences in appearance between males and females, unlike the other organisms listed.