Final answer:
Monarch Butterflies reproduce through sexual reproduction, leading to genetically unique offspring. This method allows Monarch Butterflies to adapt over generations to changing environments, contrasting with asexual reproduction that produces genetically identical offspring.
Step-by-step explanation:
The reproduction method of the Monarch Butterfly is sexual reproduction. Sexual reproduction involves two parent butterflies contributing genetic material to produce genetically unique offspring. This contrasts with asexual reproduction, where offspring are genetically identical to the single parent.
A stable environmental condition favors asexual reproduction, which produces identical offspring. However, Monarch Butterflies, despite having a short life span and not all generations undertaking migration, still reproduce sexually. Each new generation produced by sexual reproduction has a mix of genetic traits from both parents, increasing the likelihood of beneficial adaptations.
While some insects, reptiles, and fish may reproduce asexually through parthenogenesis, where an unfertilized egg develops into a new organism, this is not the case for Monarch Butterflies. Insects predominantly reproduce sexually, allowing them to adapt to changing environments and producing genetically unique individuals. This accounts for the diversity seen within the species and contributes to their adaptability and survival.