Which two terms best describe a situation in which a new species is produced by the interbreeding of two members of distinct species (different species)? a. Sympatric allopolyploidy b. Allopatric allopolyploidy c. Allopatric autopolyploidy d. Sympatric autopolyploidy

The answer is **a. Sympatric allopolyploidy**.<br /><br />Here's why:<br /><br />* **Allopolyploidy:** This refers to a type of polyploidy (having more than two sets of chromosomes) where the chromosome sets are derived from different species. The interbreeding of two distinct species is key to this process.<br /><br />* **Sympatric:** This term describes the speciation that occurs when two groups of organisms live in the same geographic area. Since the two parent species are interbreeding, they must be living in the same area.<br /><br />Let's look at why the other options are incorrect:<br /><br />* **Allopatric:** This refers to speciation that occurs when two groups of organisms are geographically isolated. This contradicts the premise of the question.<br />* **Autopolyploidy:** This refers to a type of polyploidy where the extra chromosome sets are derived from the same species. This doesn't fit the description of interbreeding between *distinct* species.<br />