Identify whether hybridization would likely lead to speciation or homogenization in each scenario. Several breeding pairs of cactus finch ground finch hybrids have successfully produced fertile, viable offspring for at least three consecutive generations. These hybrids have been unsuccessful breeding to non-hybrid cactus finches or ground finches. Are the hybrid finches likely to be speciating or homogenizing? The Texas bluebonnet, a flower native to Texas, grows wild along roadsides. It is also planted along roadsides in many beautification projects across Texas. Breeding between the planted blucbonnets and wild bluebonnets produces a hybrid that is genetically compatible with both parental varieties. Are the hyrbid blucbonnets likely to be speciating or homogenizing? Helianthus anomalus is a hybrid sunflower created by the natural breeding of H. annuus and H. petiolarus. Helianthus anomalus is a fertile, viable hybrid that can only successfully reproduce with other H. anaomalus. Are the hybrid sunflowers likely to be speciating or homogenizing?

n the savannahs of the Amazon different species of the genus Ipomoea are pollinated by either bumblebees or hummingbirds; lavender flowered I. marabaensis and red flowered I. cavalcantei. Which of the follwing data would support the suggestion of natural interspecific hybridization with weak postzygotic isolation?   A. magenta flowered hybrids found in the wild were infertile and bidirectionally crossing with parental species   B. magenta flowered hybrids found in the wild were preferentially pollinated by introduced honeybees rather than parental pollinators   C. In the laboratory, offspring resulting from crosses between I. cavalcantei, I. marabaensis showed a mixture of parental floral characteristics   D. In the laboratory, offspring resulting from crosses between I. cavalcantei, I. marabaensis and magenta flowered hybrid plants were autotropic and showed hybrid viability

Distinct species that are able to interbreed in nature are said to “hybridize,” and their offspring are called “hybrids.” The gray oak and the Gambel oak can mate to produce fertile hybrids in regions where they co-occur. However, the gene flow in nature is sufficiently limited that, overall, the two species remain phenotypically distinct. If the hybrid offspring survive well and reproduce to the extent that there is a large population of hybrid individuals that breed between themselves but do not interbreed with either of the two original parent species (the gray and the Gambel), which of the following would you say most likely led to the new hybrid species?(a) prezygotic reproductive barriers (b) sympatric speciation (c) allopatric speciation (d) postzygotic reproductive barriers (e) none of the above

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 Allopolyploid speciation O Behavioral isolation O Allopatric speciation O Sympatric speciation O Adaptive radiation