Tropical plant fossils have been found in cold Arctic islands where they cannot survive in the present-day climate of this area. According to Wegener's theory, how were these ancient tropical plants able to survive in Arctic islands? Plants were more adaptable in the past.
The poles of Earth were warmer in the past.
Arctic islands were closer to the equator in the past.
Land movements warmed the landmasses in the past.

Although a number of things brought about world war one there was one even that push to europe over the edge. what was that event?

Interest groups are protected by the first amendment guarantees of petition and what other freedom?

Match these items. 1 . stephen douglas published "north star" 2 . frederick douglass first african slaves arrived in jamestown 3 . crittenden compromise proposed kansas-nebraska act 4 . republican party extend 36° 30' line to california 5 . abolitionists servitude in exchange for passage to the united states 6 . indentured struggle between proslavery and antislavery groups 7 . jefferson davis formed to prevent spread of slavery 8 . "bleeding kansas" wanted slavery abolished 9 . uncle tom's cabin president of confederacy 10 . 1619 harriet beecher stowe