Question

sympatric speciation
involves reproductive isolation of dispersed populations.
can result from the generation of fertile triploid plants.
results only from the generation of allopolyploids.
is common in plants since many plant species can reproduce by self - fertilization.
is often associated with polyploidy in animals.

Explanation:

Sympatric speciation occurs in the same geographical area. In plants, due to self - fertilization ability, sympatric speciation can happen more easily. Dispersed populations are related to allopatric speciation. Triploid plants are often sterile. Allopolyploids are not the only cause of sympatric speciation. Polyploidy in animals is not a common association with sympatric speciation.

Answer:

is common in plants since many plant species can reproduce by self - fertilization.