Because sea stars eat many clams and oysters, divers were hired to catch sea stars and chop them into pieces. After this fishers found even more empty clam ad oyster shells than before. How did their plan backfire?

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.