question: Why could n't differences in flora and fauna be explained by differences in regions alone ?
answer: South America , Africa , and Australia all have regions with similar climates at similar latitudes , but those regions have very different plants and animals
turker_answer: Differences in flora and fauna can not be explained by differences in regions alone , because South America , Africa , and Australia all have regions with similar climates at similar latitudes but very different plants and animals .
rule-based: N't differences in flora and fauna could be explained by differences in regions alone because South America , Africa , and Australia all have regions with similar climates at similar latitudes , but those regions have very different plants and animals .