g Within a population of sunflowers, a new individual has a novel dominant mutation that causes it to flower 4 months earlier than the rest of the population. That sunflower survives and successfully self-fertilizes, leading over time to a novel population that evolves larger leaves and smaller flowers. This new population does not interbreed with the original population, although they are found in the same areas. This is an example of .

This question lacks options, options are: A. Allopolyploid speciation B. Behavioral isolation C. Allopatric speciation D. Sympatric speciation E. Adaptive radiation. The correct answer is D.

Explanation:

Sympatric speciation consists of different populations of the same species, occupying the same territory, diversifying due to the appearance of isolation mechanisms that fulfill the same function as geographical barriers (a river, a mountain or a separation of tectonic plates, for example) that makes contact between both populations impossible. Sympatric speciation is a bit more difficult to understand, since a tangible and observable barrier appears in the first instance that makes contact between individuals of the same species and population impossible. In sympatric speciation there may be alleles for a gene that encode more or less successful behaviors in the face of certain events. As this genetic information is heritable from parents to children and, under certain conditions, it can be expected that A2 species end up presenting sufficient behavioral differentiation with respect to A1 to give rise to different species after a long period of time. Both populations will end up exploiting different niches and accumulating very diverse adaptations, giving rise to two different species.