Which word describes changes over time in living organisms?

Which word describes changes over time in living organisms?

• A. Adaptation
• B. Evolution
• C. Natural selection
• D. Convergent evolution

Answer: (B)

Evolution captures the idea of changes in living organisms over time by describing how populations accumulate genetic variations across generations, leading to new traits and, over long periods, the emergence of new species. This process explains why life forms become different from their ancestors and how diversity arises, tied to how genes are passed down and how some traits become more common because they improve reproductive success. Adaptation refers to a trait that helps an organism survive or reproduce in a given environment; it’s a possible outcome within evolution, not the whole process itself. Natural selection is one mechanism that drives evolution by favoring individuals with advantageous traits, shaping allele frequencies over generations. Convergent evolution describes unrelated groups developing similar traits due to similar environments, illustrating a pattern rather than the broad concept of change over time. So the term that best fits the idea of changes over time in living organisms is evolution.

Evolution captures the idea of changes in living organisms over time by describing how populations accumulate genetic variations across generations, leading to new traits and, over long periods, the emergence of new species. This process explains why life forms become different from their ancestors and how diversity arises, tied to how genes are passed down and how some traits become more common because they improve reproductive success. Adaptation refers to a trait that helps an organism survive or reproduce in a given environment; it’s a possible outcome within evolution, not the whole process itself. Natural selection is one mechanism that drives evolution by favoring individuals with advantageous traits, shaping allele frequencies over generations. Convergent evolution describes unrelated groups developing similar traits due to similar environments, illustrating a pattern rather than the broad concept of change over time. So the term that best fits the idea of changes over time in living organisms is evolution.