1. Reproduction is the process by which living organisms produce new individuals of the same species through asexual or sexual reproduction. It is necessary for survival and increasing population size. 2. Asexual reproduction involves a single parent and methods include fission, budding, regeneration, fragmentation, and spore formation. Sexual reproduction involves two parents fusing male and female gametes. 3. In humans, sexual reproduction involves the male and female reproductive systems. Fertilization occurs when sperm fuse with eggs in the fallopian tubes, and the embryo implants in the uterus for gestation.