Final answer:
Sexual reproduction refers to the method by which new organisms are created through the fusion of genetic material from two different individuals, resulting in genetically unique offspring.
Step-by-step explanation:
The term sexual reproduction is defined as the process by which new living organisms are produced through the combination of genetic materials from two distinct individuals, resulting in genetically diverse offspring. This process typically involves the fusion of haploid reproductive cells (gametes) such as sperm and eggs, forming a diploid zygote that will develop into a unique individual. This method of reproduction allows for a high degree of genetic variation, which can confer an adaptive advantage in environments that are unstable or unpredictable.
Various mechanisms of sexual reproduction include internal fertilization, as seen in many terrestrial animals, and external fertilization, as seen in many aquatic species. Despite being less efficient in producing offspring compared to asexual reproduction, sexual reproduction's ability to increase genetic diversity can help a species better adapt to changing conditions.