Final answer:
Sexual reproduction provides advantages over asexual reproduction by creating genetic diversity, which can improve evolutionary fitness in changing environments. However, it requires finding mates and typically half the population (females) bearing the young, resulting in a potential slower population growth rate compared to asexual reproduction, where every individual can reproduce.
Step-by-step explanation:
Organisms that reproduce sexually have a distinct advantage over those that reproduce asexually when it comes to genetic diversity. The combination of genetic materials from two parents during sexual reproduction introduces variation among offspring. This diversity provides a buffer against environmental changes, as some individuals may possess traits that allow them to survive and adapt to new conditions. Thus, sexual reproduction enhances the evolutionary fitness of a species.
However, sexual reproduction does come with disadvantages. It typically requires finding a mate, which consumes energy and time that could be used for producing more offspring. In addition, since only females typically bear the young, the potential growth rate of a population can be lower compared to asexually reproducing populations where every individual is capable of reproduction.
Mutations play a critical role in both types of reproduction. Asexual reproduction relies entirely on mutations for any genetic variation within the population, while sexual reproduction also involves recombination and independent assortment to shuffle these mutations and produce new combinations of genes.