What term describes the evolution of similar traits in unrelated species due to similar environmental pressures?

What term describes the evolution of similar traits in unrelated species due to similar environmental pressures?

• A. Diffusion
• B. Chemosynthesis
• C. Convergent Evolution
• D. Biogeochemical Cycle

Answer: (C)

Convergent evolution is the idea here: unrelated species end up with similar traits because they face similar environmental pressures. When different lineages live in the same kind of environment, natural selection favors comparable adaptations that help with the same job, like moving efficiently through water. In marine life, this shows up as streamlined, fusiform bodies in animals from different lineages (for example, dolphins and sharks) that reduce drag and improve swimming performance, even though their ancestors were not closely related. These similarities are about function and appearance, not shared ancestry—traits are analogous rather than homologous. Other options don’t describe this pattern: diffusion is just the spread of substances, chemosynthesis is a metabolic process, and a biogeochemical cycle refers to element movement through the earth system.

Convergent evolution is the idea here: unrelated species end up with similar traits because they face similar environmental pressures. When different lineages live in the same kind of environment, natural selection favors comparable adaptations that help with the same job, like moving efficiently through water. In marine life, this shows up as streamlined, fusiform bodies in animals from different lineages (for example, dolphins and sharks) that reduce drag and improve swimming performance, even though their ancestors were not closely related. These similarities are about function and appearance, not shared ancestry—traits are analogous rather than homologous. Other options don’t describe this pattern: diffusion is just the spread of substances, chemosynthesis is a metabolic process, and a biogeochemical cycle refers to element movement through the earth system.