Which of the following is an unintended consequence of cutting down trees? A. Depleting wooded areas means fewer habitats for forest organisms. B. Cleared land can be used for agriculture. O C. People burn wood for fuel. D. People use wood to build houses.

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.