Which statement represents the
advantage and disadvantage of
being acid-fast?
A. it reproduces slowly; it contains waxes
B. it separates the cell from the environment; it has a cell wall
C. it contains waxes; it reproduces slowly
D. it has a cell wall; it separates the cell from the environment

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.