How are southern appalachian (u. s.a.) and southwestern caucasus (russia) forests similar? question 9 options: a- they are both southern hemisphere deciduous forests. b- they are both northern hemisphere, warm-temperate forests. c- they are both northern hemisphere, boreal forests. d- they actually share no similarities.

The correct answer is (B) They are both Northern Hemisphere, warm-temperate forests. Although Appalachian (U.S.A.) and Southwestern Caucasus (Russia) have common origins, both northern hemisphere warm-temperature Tertiary forests, they have developed differently. The similarities also include the species-to-genus, species-to-families ratios and the floristic composition.