Indicate the order in which the following steps would take place to result in Sympatric Speciation [enter 1 for the first step, 2 for the second, etc; write only the number -- no words, no spaces]    As they adapt to their specific environments, the fitness of any hybrid formed is reduced.  Reproductive isolating mechanisms are selected for so that less fit hybrids are not formed. Two species now exist.  Interbreeding populations connected via gene flow occur across a range.  The populations in the new environment adapt to their particular circumstances while the remainder stay as they were.  Something happens so that some members of the populations/species change their environment (shift hosts; have a genetic change like polyploidy or inversions), so that they are separated from the others even thought hey are living in the same area.

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A: Gene: It is basic physical unit of inheritance, which is transferred from parents to offspring.

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.