The mystery food sample contains a lipid because it was red in contact with the indicator Sudan Red which is an indicator of lipids. The food sample was also tested with the following indicators:
and
No color change was present with the other indicators; therefore, the mystery food sample contains only
and no other macromolecules.

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.