2. Which of the following describes the cytoskeleton? A. a web of proteins that gives shape and support to the cell
B. a membrane-bound organelle that contains genetic material
C. the outer covering of a cell that separates it from the environment
D. the structure that contains the information about how to make a cell's
proteins

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.