Natural biomes once covered nearly all of the land of the united states. how has the land of the united states changed today? a. about half of the land is now covered by anthromes, or human-altered biomes. b. nearly all of the land is now covered by anthromes, or human-altered biomes. c. human activities have removed wildlife from about half of the land. d. human activities have removed plant life from about half of the land.

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.