How can fertilizer use be detrimental to the environment? a. it can enter waterways, causing them to accumulate an excess of nutrients. b. high levels of fertilizer in bodies of water can lead to excess algal growth. c. fertilizer can lead to oxygen depletion, and be harmful to organisms in waterways. d. all of the above

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.