What is responsible for sharp differences in species diversity between places such as India vs Southeast Asia or Australian mammals vs the rest of the world? 1. Volcanic eruptions 2. Climate change 3. Sexual selection 4. Polyploidy 5. Continental drift

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Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.