How could you determine whether two groups of organisms that

How could you determine whether two groups of organisms that live in two different parts of the world were members of the same species, according to the biological species concept? Move individuals from one group to the other to see if they are accepted by the other group\'s members. Observe whether their physical features are the same. Test their ability to mate with one another. Compare their genomes to see if they are identical. Move individuals from their native habitat to the other group\'s habitat to see if they adapt. Two closely related species of tomatoes hybridize. Hybridization disrupts meiosis, but otherwise the hybrids are normal. What phenomenon likely explains this result? Mechanical isolation Allopolyploidy Temporal isolation Allopatric speciation Autopolyploidy Two species of three-spined stickleback fish have been found together in five different lakes. The larger, bottom-dwelling species feeds on large prey close to shore. A surface-dwelling species feeds on small plankton in open water. DNA analysis shows that the two species in each lake are more closely related to each other than they are to any of the other species in the lakes. However, they are reproductively isolated. These two species are likely to have arisen due to allopatric speciation. allopolyploidy. sympatric speciation. polyploidy. autopolyploidy.

Solution

1. One way to prove that two organisms belong to the same species, is to mate them and check if they can produce fertile offsprings. However, in this case, since they have been isolated geographically, they might have undergone speciation, and may no longer be able to produce a fertile offspring with eachother. That eliminates option 3. Physical features cannot be the best measure of similarity, nor can be acceptance by the members of other groups. Therefore, the best way to check if they belonged to the same species is to test their DNA for similarities.
The answer would be, \'Compare their genomes to see if they are identical.\'

2. The answer is allopolyploidy. Here, the chromosomes have come from two closely-related but different species. Hence, the hybrids are stable, but meiosis cannot take place.

3. The answer is sympatric speciation. The two species have evolved without being geographically isolated. The other options like polyploidy, allopolyploidy etc. have nothing to do with this phenomenon.