Final answer:
Natural selection does not always yield the "perfect" adaptation due to variation in inherited traits, limitations in resource availability, and the failure of some populations to adapt successfully.
Step-by-step explanation:
Natural selection does not always yield the "perfect" adaptation due to several reasons:
- There is variation in the inherited traits of organisms within a species. This variation is necessary for natural selection to occur as it allows for some individuals to have traits that are better suited to their environment.
- Organisms do not have ideal environments with unlimited resources. The availability of resources can vary, and organisms may not always have access to all the necessary resources for survival and reproduction.
- Not all populations adapt successfully to environmental changes. While some species are able to adapt and survive, many others have gone extinct throughout evolutionary history.